Question

If 10,x,x and 90 are in proportion find x

Answer 1

Answer:

10:30:30:90

Step-by-step explanation:

Given,

10:x::x:90

Then,

10*90=$x^{2}$

or, x=$\sqrt{900}$

or,x= 30

THEN,

10:30:30:90

Answer 2

Answer:

10:x::x:90

10/x=x/90

90*10/x=x

900=x^2

x=√900

x=30