Question

What is the solution the proportion?
9 4
- = -
x 12


A.
13

B.
27

C.
3

D.
17

Answer 1

WILL MEDAL!

Answer 2

Never "cross multiply". It is utterly silly and useless. Simply solve for the variable.

9/x = 4/12

Simplfy where possible

9/x = 1/3

x cannot be zero, so multiply by that.

9 = x/3

Multiply by 3.

x = 27

Done!

Answer 3

Thank you so much!:D

Answer 4

No problem!:) Anytime!:)