Verb
cross-multiply (third-person singular simple present cross-multiplies, present participle cross-multiplying, simple past and past participle cross-multiplied)
To set the product of the extremes of a proportion equal to the product of its means.
Cross-multiplying
3
/
5
=
x
/
2
{\displaystyle 3/5=x/2}
yields
3
×
2
=
5
x
{\displaystyle 3\times 2=5x}
.