00:03
We know that the cross products in a proportion are equal.
00:07
So if we write this equation, ad equals b, c, following this format here, we can solve for k.
00:13
In this case, a, negative 3 and 1 half, times d, which is 4, should be equal to b, which is k, times c, which is 2 and 1 3rd.
00:29
So we're following the same process here just becomes a tad more difficult because we do have those fractions.
00:34
So negative 3 .5 times 4 is negative 14, and that must be equal to 2 and 1 3rd.
00:48
Okay.
00:50
Now, i personally prefer to eliminate the fraction.
00:56
So in this case, i may multiply this entire equation by 3...