Australians Marc Leishman and Adam Scott saved their best for last, shooting a 65 yesterday to finish in a tie for ninth at 11 under.
"Even daring to dream we'd birdie the whole back nine it wasn't going to be enough," said Scott, who had paired with Jason Day to win the previous edition of the World Cup at Royal Melbourne in 2013.
"We needed a faster start."
Kiwis Danny Lee and Ryan Fox were unable to challenge the leaders during the final round. They finished in a tie for 11th place, 10 shots behind Denmark.
Lee and Fox carded a five-under 67 in the final four-balls round to finish 10-under par.
All 28 two-man teams shot two under or better on the final day, with the best round of 10-under 62 coming from world No9 Alex Noren and fellow Swede David Lingmerth.
It lifted Sweden to outright fifth on 15-under 273, a shot ahead of Italians Francesco Molinari and Matteo Manassero and Japan's Hideki Matsuyama and Ryo Ishikawa.
Kjeldsen and Olesen broke the event open with a scintillating 12-under 60 in the other round of best-ball competition on Friday and were never headed.
- AAP