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Finding the Fourth Proportional to 18,874.17, 28,309.82 and 5,726.61

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Solution

The fourth proportional to 18,874.17, 28,309.82 and 5,726.61 is: 8,589.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874.17 : 28,309.82 = 5,726.61 : x
  2. Step 2: Convert to fraction form
    18,874.17/28,309.82 = 5,726.61/x
  3. Step 3: Cross multiply
    18,874.17x = 28,309.82 × 5,726.61
  4. Step 4: Simplify right side
    18,874.17x = 162,119,269.68
  5. Step 5: Solve for x
    x = 162,119,269.68/18,874.17
  6. Step 6: Final answer
    x = 8,589.48

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1.5x scale

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.