Write the missing term in a proportion. Write your answer on the blank.
21) 3 : 5 = n : 25 n=_______
22) 20 : 24 = n =6 n=_______
23) n : 6 = 3 :2 n=_______
24) 2 : 4 = 7 : n n=_______
25)6 : 9 = n : 12 n=_______