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Finding the Fourth Proportional to 18,115.52, 27,168.24 and 12,307.76

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Solution

The fourth proportional to 18,115.52, 27,168.24 and 12,307.76 is: 18,458.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.52 : 27,168.24 = 12,307.76 : x
  2. Step 2: Convert to fraction form
    18,115.52/27,168.24 = 12,307.76/x
  3. Step 3: Cross multiply
    18,115.52x = 27,168.24 × 12,307.76
  4. Step 4: Simplify right side
    18,115.52x = 334,380,177.54
  5. Step 5: Solve for x
    x = 334,380,177.54/18,115.52
  6. Step 6: Final answer
    x = 18,458.22

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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.