In the given problem, apply your knowledge in algebraic and basic mathematics specially in ratio, fraction and simplifying equation.
Ratio define as the quantitative relation between of two numbers and/or amounts that shows how times one value contained within the other.
In this case, the 2⁄3 is the ratio of rise to run and it's being
In this case, the 2⁄3 is the ratio of rise to run and it's being proportional to another value.
Let x is the run (vertical).
2/3 = rise / run = 9/x
2/3 = 9/x
2x = 27
x = 27/2
x = 13.5
Answer: 13.5
Learn more about ratio here at https://brainly.ph/question/8828256
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