Use cross products to determine which ratio forms a proportion with nine over four is it 5/3 or 27/12 or 36/20 or 18/4
To determine which ratio forms a proportion with nine over four, we can use the cross product method.
The cross products of a proportion should be equal. In this case, the cross products would be 9 * x and 4 * y, where x and y are the numerator and denominator of each ratio respectively.
For the ratio 5/3:
Cross products are 9 * 5 = 45 and 4 * 3 = 12, which are not equal.
Therefore, 5/3 does not form a proportion with nine over four.
For the ratio 27/12:
Cross products are 9 * 27 = 243 and 4 * 12 = 48, which are not equal.
Therefore, 27/12 does not form a proportion with nine over four.
For the ratio 36/20:
Cross products are 9 * 36 = 324 and 4 * 20 = 80, which are not equal.
Therefore, 36/20 does not form a proportion with nine over four.
For the ratio 18/4:
Cross products are 9 * 18 = 162 and 4 * 4 = 16, which are not equal.
Therefore, 18/4 does not form a proportion with nine over four.
None of the given ratios form a proportion with nine over four.