Basic Mathematics

Ratio, Rate, and Proportion

Finding Unknown Ratios

         

The ratio 2 to 3 is equivalent to the ratio 12:N 12 : N . What is the value of NN?

For what value of NN do we have

5:8=25:N? 5 : 8 = 25 : N ?

For what value of NN do we have

2:7=6:N? 2 : 7 = 6 : N ?

If xx satisfies both the proportional expression (x5):(x+4)=2:3(x-5):(x+4)=2:3 and the linear equation 13(x2)=3x4(3a)\frac{1}{3}(x-2)=\frac{3-x}{4}-(3-a), what is the value of the constant aa?

For what value of NN do we have

10:16=40:N? 10 : 16 = 40 : N ?

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