5 is to 8 as 15 is to (blank) ?

Answer 1

5/8 = 15/x

Cross multiply and solve for x.

5x = 120
x = 24

Answer 2

5 : 8 = 15 : 8

5/8 = 15/x
Cross multiply
5x = 270
x = ?

Answer 3

Should be

5 : 8 = 15 : x
5x = 120
x = ?

Answer 4

i still don't get the anwser but thanks anyway ! :)