Home / 2-15

Finding the Third Proportional to 2 and 15

Calculator

Solution

The third proportional to 2 and 15 is: 112.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2 : 15 = 15 : x
  2. Step 2: Convert to fraction form
    2/15 = 15/x
  3. Step 3: Cross multiply
    2x = 15 × 15
  4. Step 4: Simplify right side
    2x = 225
  5. Step 5: Solve for x
    x = 225/2
  6. Step 6: Final answer
    x = 112.50

Related Problems

Find third proportional to 1 and 7.50
Half scale
Find third proportional to 4 and 30
Double scale
Find third proportional to 4 and 30
Similar ratio
Find third proportional to 3 and 22.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (7.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.