# Search for tag: "proportion"

#### Solving a rational equation that simplifies to quadratic: Proportional form, advanced

This shows how to use the LCD of the two fractions that form a proportion to simplify the equation to a quadratic equation, then solve the quadratic by factoring and check the validity of the …

From  Tom Grant 10 plays 0

#### Solving for a variable in terms of other variables in a rational equation: Problem type 1

Demonstrates how to rearrange a proportion to isolate a chosen variable. Note that none of the variables are elliminated, simply moved to new positions.

From  Tom Grant 11 plays 0

#### Solving a rational equation that simplifies to quadratic: Proportional form, basic

Single fractions set equal to each other forms a proportion. When presented with this, it can be "cross multiplied" to eliminate the fractions. The resulting equation has a term with the…

From  Tom Grant 6 plays 0

#### Applying the percent equation: Problem type 1

Using the proportion %/100 = Amount/Base to plug in what's given to find what is asked for.

From  Tom Grant 14 plays 0

#### Solving a proportion of the form (x + a)/b = c/d

Demonstrating why we can "cross muliply" a proportion to solve it, we then do that.

From  Tom Grant 18 plays 0

#### Equivalent Fractions

Shows how to find a numerator for a larger denominator when given a simpler fraction that is set eqaul to the one with the unknown numerator.

From  Tom Grant 18 plays 0