SOLUTION: the ratio of students who rode horses to school to students who walked to school was 2 to 9. if 18 students walked to school, how many rode horses to school?

Algebra ->  Algebra  -> Proportions  -> Lessons  -> Proportions -> SOLUTION: the ratio of students who rode horses to school to students who walked to school was 2 to 9. if 18 students walked to school, how many rode horses to school?      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 121521This question is from textbook algebra 1/2 an incremental development
: the ratio of students who rode horses to school to students who walked to school was 2 to 9. if 18 students walked to school, how many rode horses to school?This question is from textbook algebra 1/2 an incremental development

Answer by Earlsdon(6103) About Me  (Show Source):
You can put this solution on YOUR website!
You can set up a proportion to help sovle this kind of problem:
Let H = the number of students who rode horses to school and W = the number of students who walked to school, then you can write:
H%2FW+=+2%2F9
Now you can substitute the W with 18 since that is the number of students who walked to school:
H%2F18+=+2%2F9 Now you can solve this for H, the number of students who rode horses to school:
H%2F18+=+2%2F9 Multiply both sides by 18.
H+=+2%2818%29%2F9
H+=+4
The number of who rode horses to school was 4.