Question

If the first three terms in a proportion are 12, 30 and 25, Find the fourth term?

Answer 1

Answer:

the first three terms of the proportion are 12 , 30 , 25 .

let the 4th term be X

ratio of 12 and 30 = 12 : 12

12 : 30 can also be written as 12 / 30 = 2 / 5

ratio of 25 and X = X : 25

25 : X can also be written as 25 / X

the value of x is 10

so the proportion can be written as 12 : 30 : : 10 : 25 .