Proportions

Isaias Vasquez Ms.Sa
702 4/3/09

Aim : How do we solve proportions by using cross products?

1) The term cross product can help us remember how to solve a proportion. When they have you cross product. When the answer are both the same it proportions.

2) They are did some thing right. But they put the wrong answer. They should have put 36. But they put 18. That divided the 36 to 2 and got 18.

3)You can find the answer by using the cross products 6 2
-- =--
45 15
by first multiply 6 and 15 that makes 90. They multiply 45 and 2 makes 90. That makes it a proportion.