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Finding the Fourth Proportional to 18,423.68, 27,631.68 and 5,272.48

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Solution

The fourth proportional to 18,423.68, 27,631.68 and 5,272.48 is: 7,907.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,423.68 : 27,631.68 = 5,272.48 : x
  2. Step 2: Convert to fraction form
    18,423.68/27,631.68 = 5,272.48/x
  3. Step 3: Cross multiply
    18,423.68x = 27,631.68 × 5,272.48
  4. Step 4: Simplify right side
    18,423.68x = 145,687,480.17
  5. Step 5: Solve for x
    x = 145,687,480.17/18,423.68
  6. Step 6: Final answer
    x = 7,907.62

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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.