Question

What is the value of x? Enter your answer in the box. __mm

Answer 1

You can set up a ratio as follows:
$\frac{x-22}{87.5}= \frac{22}{77}$

Solve for x by cross-multiplying:
$(x-22)(77) = (87.5)(22)$
$x = \frac{(87.5)(22)}{77} + 22= 47.01$

Since we need the answer in mm and right now we have it in feet, we need a conversion ratio. After googling it, the conversion ratio is: 1ft = 304.8mm
$47.01(304.8) = 14326.64$

So, the answer is 14326.64 mm.