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Finding the Fourth Proportional to 18,840, 28,264.52 and 5,691.56

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Solution

The fourth proportional to 18,840, 28,264.52 and 5,691.56 is: 8,538.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,840 : 28,264.52 = 5,691.56 : x
  2. Step 2: Convert to fraction form
    18,840/28,264.52 = 5,691.56/x
  3. Step 3: Cross multiply
    18,840x = 28,264.52 × 5,691.56
  4. Step 4: Simplify right side
    18,840x = 160,869,211.45
  5. Step 5: Solve for x
    x = 160,869,211.45/18,840
  6. Step 6: Final answer
    x = 8,538.71

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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.