Cross Products is the ratio between two sets of measurements.
Could be the conversion factor - but only if the two sets of measurements are on scales that are linear AND absolute.
The ratio is the same as the ratio between the number of teeth.
There is no real reason for two equivalent measurements to be rationed! The ratio of two equivalent measurements will depend on the units used. The ratio between a length in feet and the equivalent length in inches, for example, is 12:1.
The ration between two corresponding measurements is called a rate. It separates miles per gallon and feet per second when corresponding.
It is simply the first measurement divided by the second, expressed with their measurement units as a ratio.
The ratio between two different quantities is the rate.When expressed in words, "per" separates the two measurements described; for example, miles per gallon, feet per second.