In the fourth match at the Gaddafi Stadium here, the Tanmay Srivastav-led side scored a thumping four-wicket win, reaching the target of 192 in 43.1 losing six wickets in the process.
Pakistan's decision to bat first after winning the toss backfired as the openers were cheaply dismissed by the Indian bowlers.
Middle order batsmen Zeeshan (44), Rana Adnan (38), Usman Salahuddin (32) and Jamal Anwar (26) gave some respectability to the Pakistan total.
Sharma turned out the nemesis and ran through the middle order while Abu Nachim and Piyush Chawla got one wicket each.
In reply, India also began on a shaky note losing the opening pair early in the innings. However, middle order batsmen Ravindra Jadeja and B Sumanth stuck together to build a big partnership.
Man-of-the-match Jadeja was unlucky not to complete a ton and was out for 94 caught by Imad Waseem off Mohibullah. Sumanth also missed his half-century by a mere two runs. M Naved, with the figures of 3/39, was the most successful bowler from Pakistan U-19 side.
Piyush Chawla was adjudged Man-of-the-series.India had earlier won the first three one-dayers by 82, seven and 174 runs respectively.
Brief scores: Pakistan U-19 191 all out (Zeeshan Mushtaq 44 not out, Rana Adnan 38, Usman Salahuddin 32, Sumeet Sharma 5/36) India U-19 192/6 (Ravindra Jadeja 94, B Sumanth 48, Tanmay Srivastav 25 not out, M Naved 3/39).