Home / 6.66-15

Finding the Third Proportional to 6.66 and 15

Calculator

Solution

The third proportional to 6.66 and 15 is: 33.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.66 : 15 = 15 : x
  2. Step 2: Convert to fraction form
    6.66/15 = 15/x
  3. Step 3: Cross multiply
    6.66x = 15 × 15
  4. Step 4: Simplify right side
    6.66x = 225
  5. Step 5: Solve for x
    x = 225/6.66
  6. Step 6: Final answer
    x = 33.80

Related Problems

Find third proportional to 3.33 and 7.50
Half scale
Find third proportional to 13.31 and 30
Double scale
Find third proportional to 9 and 20
Similar ratio
Find third proportional to 9.98 and 22.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.