SOLUTION: Rational expression. Solve by using a proportion. The student-teacher ratio for Washington High was reported to be 27.5 to 1. If there are 42 teachers, then how many students a

Question 49764This question is from textbook
: Rational expression. Solve by using a proportion.
The student-teacher ratio for Washington High was reported to be 27.5 to 1. If there are 42 teachers, then how many students are there?
Thank you! This question is from textbook

Answer by tutorcecilia(2152) (Show Source): You can put this solution on YOUR website!
a/b = c/d [Use the proportion ratio]
27.5 students/1 teacher = x students/42 teachers [Plug-in the values]
(27.5)(42)=(1)(x) [Cross-multiply]
1155 = x [Number of students]
.
Check by plugging all of the values back into the original equation]
1/b = c/d
27.5/1 = 1155/42 [Solve each side of the equation]
27.5 = 27.5 [Checks out]
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