Chanelledevelascogo Chanelledevelascogo Math Answered 1. Find the missing term (n) in the proportion 18:12 = 12:n 2. Find the missing term (n) in the proportion 36:n = 9:2 3. Find the missing term (n) in the proportion 5:3 = n:15 4. Find the missing term (n) in the proportion 8:n = 4:3