Determining the value of x in a proportion: Write the proportion with the

SchachtN

SchachtN

Answered question

2021-09-07

Determining the value of x in a proportion:
Write the proportion with the known digits on the LHS (left hand side) of the equation, whereas the unknown quantity should be written on the RHS (right hand side) of the equation.
For example,
515=x21

Answer & Explanation

Laith Petty

Laith Petty

Skilled2021-09-08Added 103 answers

Cross multiply:
515=x21
15×x=5×21
15x=105
Isolate x,
x=10515 (simplify the fraction)
x=7

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