Proportions Cross Product

• 2

• 4

• 5

• 6

• 8

• 10

• 12

• 14

• 7

• 14

• 21

• 28

Mathematical Equivalence

OFF

If cross products are ​ ​ (a)   , the proportion is false; if cross products are equal, the proportion is​ (b)  

• not equal

• false

• true.

• the same

• not a proportion

The cross products of the proportions 2 : 5 and 30 : 75 are

What is the correct next step when using the cross product method on this problem?

• 1(10) = 2(5)

• 1(5) = 2(10)

• 1(2) = 5(10)

Solve this proportion for X.

• x = 3

• x = 1

• x = 12

• x = 48

Mathematical Equivalence

ON

• 5

• 10

• 15

• 20