SOLUTION: If the ratio of width to length for the U. S. flag is 10 to 19, then how long should a flag be that is 38 inches wide? I'm not sure how to calculate the difference between the 10 a

Algebra ->  Proportions  -> Lessons -> SOLUTION: If the ratio of width to length for the U. S. flag is 10 to 19, then how long should a flag be that is 38 inches wide? I'm not sure how to calculate the difference between the 10 a      Log On


   

Question 541004: If the ratio of width to length for the U. S. flag is 10 to 19, then how long should a flag be that is 38 inches wide? I'm not sure how to calculate the difference between the 10 and 19 and apply it to the second dimensions.
Answer by AnlytcPhil(1806) About Me  (Show Source):
You can put this solution on YOUR website!
You can think of the 10 to 19 ratio as a small flag 
with a width of 10 inches and a length of 19 inches.  
We want to know the length of a large flag if the width
of the large flag is 38 inches.

Let the length of the large flag be L.  
We use this proportion equation: 

 = 

            10%2F19 = 38%2FL

Cross multiply:

           10L = 19×38
           10L = 722
             L = 722%2F10
             L = 72.2 inches in length.

Edwin