Home / 18,743.13-28,115.19-8,207.71

Finding the Fourth Proportional to 18,743.13, 28,115.19 and 8,207.71

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Solution

The fourth proportional to 18,743.13, 28,115.19 and 8,207.71 is: 12,311.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,743.13 : 28,115.19 = 8,207.71 : x
  2. Step 2: Convert to fraction form
    18,743.13/28,115.19 = 8,207.71/x
  3. Step 3: Cross multiply
    18,743.13x = 28,115.19 × 8,207.71
  4. Step 4: Simplify right side
    18,743.13x = 230,761,255.83
  5. Step 5: Solve for x
    x = 230,761,255.83/18,743.13
  6. Step 6: Final answer
    x = 12,311.78

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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.