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Finding the Fourth Proportional to 18,660.17, 27,967.57 and 8,787.89

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Solution

The fourth proportional to 18,660.17, 27,967.57 and 8,787.89 is: 13,171.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660.17 : 27,967.57 = 8,787.89 : x
  2. Step 2: Convert to fraction form
    18,660.17/27,967.57 = 8,787.89/x
  3. Step 3: Cross multiply
    18,660.17x = 27,967.57 × 8,787.89
  4. Step 4: Simplify right side
    18,660.17x = 245,775,928.73
  5. Step 5: Solve for x
    x = 245,775,928.73/18,660.17
  6. Step 6: Final answer
    x = 13,171.15

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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.