Home / 20,617.92-28,456.96-11,665.76

Finding the Fourth Proportional to 20,617.92, 28,456.96 and 11,665.76

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Solution

The fourth proportional to 20,617.92, 28,456.96 and 11,665.76 is: 16,101.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.92 : 28,456.96 = 11,665.76 : x
  2. Step 2: Convert to fraction form
    20,617.92/28,456.96 = 11,665.76/x
  3. Step 3: Cross multiply
    20,617.92x = 28,456.96 × 11,665.76
  4. Step 4: Simplify right side
    20,617.92x = 331,972,065.69
  5. Step 5: Solve for x
    x = 331,972,065.69/20,617.92
  6. Step 6: Final answer
    x = 16,101.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.