Solve for the variable in the following proportion.
4 is to 5 as 10 is to a

8
12
12.5
20

x=12.5

Step-by-step explanation:

4/5=10/x

cross product

5*10=4x

50=4x

x=50/4

simplify

x=25/2

x=12.5

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.

853.3

step-by-step explanation: