Question

5) find the fourth proportion to 9,18,2 is​

Answer 1

Answer:

Let the fourth proprtion to 4, 9, 12 be x

then 4:9 :: 12 :x

4 × x = 9 × 12

x = 9×12/4 = 27

Therefore fourth proprtion to 4, 9, 12 is 27