SOLUTION: The ratio of boys to girls inthe auditorium was 4 to 5. If there were 40 boys in the auditorium, how many girls were there? (hint: in this problem, the ratio 4 to 5 means that for

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: The ratio of boys to girls inthe auditorium was 4 to 5. If there were 40 boys in the auditorium, how many girls were there? (hint: in this problem, the ratio 4 to 5 means that for       Log On


   

Question 133541: The ratio of boys to girls inthe auditorium was 4 to 5. If there were 40 boys in the auditorium, how many girls were there? (hint: in this problem, the ratio 4 to 5 means that for every 4 boys there were 5 girls.)
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
4:5=40:x cross multiply.
200=4x
4x=200
x=200/4
x=50 girls.