Home / 38,581.28-57,876.16-12,279.86

Finding the Fourth Proportional to 38,581.28, 57,876.16 and 12,279.86

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Solution

The fourth proportional to 38,581.28, 57,876.16 and 12,279.86 is: 18,421.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,581.28 : 57,876.16 = 12,279.86 : x
  2. Step 2: Convert to fraction form
    38,581.28/57,876.16 = 12,279.86/x
  3. Step 3: Cross multiply
    38,581.28x = 57,876.16 × 12,279.86
  4. Step 4: Simplify right side
    38,581.28x = 710,711,142.14
  5. Step 5: Solve for x
    x = 710,711,142.14/38,581.28
  6. Step 6: Final answer
    x = 18,421.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.