# Why can you use cross products to solve the proportion mc012-1jpg for x?

• Why can you use cross products to solve the proportion mc012-1jpg for x?

How Do You Solve a Proportion Using Cross Products? ... you how to use a proportion to solve! ... equation you can solve. This tutorial let's you see ...
Positive: 67 %
You can use cross products to tell whether two ... cross product, p. 280 BEFORE Now WHY? You solved ... To solve the proportion 1 5 2 3 x 6, use one of the ...
Positive: 64 %

### More resources

Three ways to solve proportions. ... Cross-products. ... Look at the proportion on the right. Solve it. (You may use the calculator below.)
Positive: 67 %
... but suppose you hadn't noticed this. You can solve ... Proportions wouldn't be of much use if you only ... it will help you set up your proportion ...
Positive: 62 %
... so the proportion is true. To see why ... you can use to solve for the ... the proportion is false. Finding a cross product is another method ...
Example. Use cross product to determine if the two ratios form a proportion. $$\frac{2}{16},\: \: \frac{5}{40}$$ $$\frac{2}{16}\overset{?}{=} \frac{5}{40}$$