SOLUTION: solve for the missing number in the proportion. 3/5=15/x do the ratios form a proportion 1/6 and 4/8

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Question 455475: solve for the missing number in the proportion.
3/5=15/x
do the ratios form a proportion
1/6 and 4/8
Answer by MathLover1(20855) About Me  (Show Source):
You can put this solution on YOUR website!

3%2F5=15%2Fx.....cross multiply
3x=15%2A5
3x=75
x=75%2F3
x=25

the missing number in the proportion is 25

3%2F5=15%2F25...if you simplify right side dividing both numerator and denominator by 5 you will get:
3%2F5=%2815%2F5%29%2F%2825%2F5%29

3%2F5=3%2F5