Araujo qualified for the men's 4 × 200 m freestyle relay, as a member of the Portuguese team, at the 2004 Summer Olympics in Athens. Teaming with Luís Monteiro, Adriano Niz, and Miguel Pires in heat one, Araujo swam a third leg in a split of 1:54.50, but the Portuguese team settled only for seventh place and fourteenth overall with a national record of 7:27.99.