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Finding the Fourth Proportional to 18,660.81, 27,972.51 and 8,672.58

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Solution

The fourth proportional to 18,660.81, 27,972.51 and 8,672.58 is: 13,000.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660.81 : 27,972.51 = 8,672.58 : x
  2. Step 2: Convert to fraction form
    18,660.81/27,972.51 = 8,672.58/x
  3. Step 3: Cross multiply
    18,660.81x = 27,972.51 × 8,672.58
  4. Step 4: Simplify right side
    18,660.81x = 242,593,830.78
  5. Step 5: Solve for x
    x = 242,593,830.78/18,660.81
  6. Step 6: Final answer
    x = 13,000.18

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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.