Home / 20,929.76-28,882.68-11,498.12

Finding the Fourth Proportional to 20,929.76, 28,882.68 and 11,498.12

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Solution

The fourth proportional to 20,929.76, 28,882.68 and 11,498.12 is: 15,867.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.76 : 28,882.68 = 11,498.12 : x
  2. Step 2: Convert to fraction form
    20,929.76/28,882.68 = 11,498.12/x
  3. Step 3: Cross multiply
    20,929.76x = 28,882.68 × 11,498.12
  4. Step 4: Simplify right side
    20,929.76x = 332,096,520.56
  5. Step 5: Solve for x
    x = 332,096,520.56/20,929.76
  6. Step 6: Final answer
    x = 15,867.19

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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.