Home / 20,929.13-28,882.20-11,498.30

Finding the Fourth Proportional to 20,929.13, 28,882.20 and 11,498.30

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Solution

The fourth proportional to 20,929.13, 28,882.20 and 11,498.30 is: 15,867.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.13 : 28,882.20 = 11,498.30 : x
  2. Step 2: Convert to fraction form
    20,929.13/28,882.20 = 11,498.30/x
  3. Step 3: Cross multiply
    20,929.13x = 28,882.20 × 11,498.30
  4. Step 4: Simplify right side
    20,929.13x = 332,096,098.97
  5. Step 5: Solve for x
    x = 332,096,098.97/20,929.13
  6. Step 6: Final answer
    x = 15,867.65

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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.