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Finding the Fourth Proportional to 18,777.29, 28,176.32 and 7,691.76

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Solution

The fourth proportional to 18,777.29, 28,176.32 and 7,691.76 is: 11,541.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.29 : 28,176.32 = 7,691.76 : x
  2. Step 2: Convert to fraction form
    18,777.29/28,176.32 = 7,691.76/x
  3. Step 3: Cross multiply
    18,777.29x = 28,176.32 × 7,691.76
  4. Step 4: Simplify right side
    18,777.29x = 216,725,510.35
  5. Step 5: Solve for x
    x = 216,725,510.35/18,777.29
  6. Step 6: Final answer
    x = 11,541.90

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