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Finding the Fourth Proportional to 18,423.40, 27,635.10 and 8,581.90

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Solution

The fourth proportional to 18,423.40, 27,635.10 and 8,581.90 is: 12,872.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,423.40 : 27,635.10 = 8,581.90 : x
  2. Step 2: Convert to fraction form
    18,423.40/27,635.10 = 8,581.90/x
  3. Step 3: Cross multiply
    18,423.40x = 27,635.10 × 8,581.90
  4. Step 4: Simplify right side
    18,423.40x = 237,161,664.69
  5. Step 5: Solve for x
    x = 237,161,664.69/18,423.40
  6. Step 6: Final answer
    x = 12,872.85

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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.