He also maintained that the team is committed to making the most of the World Cup as it comes every four years. Australia won just two ODI matches past year, the fewest ODI victories since 1978 when it played only two one-day internationals.
"People have written us off for quite a while now", said Finch.
It was also Khawaja's third worldwide century since he returned from knee surgery before the summer - a summer where he was repeatedly criticised for his low returns as India's Test side created history on Aussie soil.
It was Australia's first ODI series win in India since 2009, when a Ricky Ponting-led side won a seven-match series 4-2, and follows humbling home Test and ODI series defeats against the same opposition. "They just showed more composure in a pressure situation", Virat said. "Even more so to get that series win, it's not easy out here".
"We always knew that the plans and the style that we wanted to play are all there (and) can win us the World Cup", he added.
Opener Usman Khawaja hit his second hundred in three matches to guide Australia to 272-9 from their 50 overs.
The win is Australia's third in a row of the tour, seeing them overturn a 2-0 series deficit.
New Zealanders reach out to Muslims in wake of mass shooting
New Zealand's Prime Minister, Jacinda Ardern , said the gunman meant to continue his attack if he hadn't been stopped. A story of true heroism is emerging from the horrific terror attacks on innocent Muslims in New Zealand .
It was a reborn Khawaja that forced India's hand on their own turf - even his dismissal in Delhi brought something out in India skipper Virat Kohli, who knew his side was under pressure.
Shankar shone with both bat and ball in the second ODI where his final over proved decisive and showed a glimpse of his potential in the other matches. After winning the toss Australian skipper Aaron Finch chose to bat first.
Director General Major General Asif Ghafoor on Wednesday took a jibe at India while congratulating Pakistan-born Australian batsman Usman Khawaja for his match-winning performance against the Indian cricket team.
Kedar Jadhav (44) and Bhuvneshwar Kumar (46) threatened to deny Australia with a 91-run partnership, but Pat Cummins and Jhye Richardson removed them in successive balls and India ultimately fell some way short on 237 all out, losing their last wicket to the final ball of the innings.
"To be here in India and winning this series, it's massive".
For those Australian cricket fans who stayed up until the early hours to watch their team's series-ending one-day global against India, a semi-sleepless night was worth it. "So it has given the Australian selectors some interesting decisions to make ahead of the World Cup squad selection", he said. The Australians have one more ODI series - five matches against Pakistan in the United Arab Emirates - before the World Cup starts in England in late May.