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Finding the Fourth Proportional to 18,658.73, 27,956.90 and 8,112.93

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Solution

The fourth proportional to 18,658.73, 27,956.90 and 8,112.93 is: 12,155.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.73 : 27,956.90 = 8,112.93 : x
  2. Step 2: Convert to fraction form
    18,658.73/27,956.90 = 8,112.93/x
  3. Step 3: Cross multiply
    18,658.73x = 27,956.90 × 8,112.93
  4. Step 4: Simplify right side
    18,658.73x = 226,812,478.41
  5. Step 5: Solve for x
    x = 226,812,478.41/18,658.73
  6. Step 6: Final answer
    x = 12,155.84

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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.