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The variable Z is directly proportional to X. When X is 12, Z has the value 36. What is the value of Z when X = 19
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3 votes
The variable Z is directly proportional to X. When X is 12, Z has the value 36. What is the value of Z when X = 19

User Kyo Dralliam
by
7.7k points

1 Answer

2 votes
The easiest way to solve this is to make a proportion problem.
Here is what we have so far...

(x)/(z)

(x(12))/(z(36)) =
(x(19))/(z)
cross multiply
12z = 36 × 19
12z = 684
z = 57

User Adam Katz
by
8.3k points
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