# Solve the proportion x over x plus 1 equals 4 over x plus 4. What is the value(s) of x?

##### 1 Answer

See a solution process below:

#### Explanation:

We can write this proportion as:

Next, we can do cross product or cross multiply the equation:

We can now put this in standard form:

Then, the left side of the equation is a difference of squares so we can factor it as:

Now, to find the values of

**Solution 1**

**Solution 2**

**The Solutions Are:**