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Finding the Fourth Proportional to 18,618.98, 27,930.52 and 5,472.38

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Solution

The fourth proportional to 18,618.98, 27,930.52 and 5,472.38 is: 8,209.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.98 : 27,930.52 = 5,472.38 : x
  2. Step 2: Convert to fraction form
    18,618.98/27,930.52 = 5,472.38/x
  3. Step 3: Cross multiply
    18,618.98x = 27,930.52 × 5,472.38
  4. Step 4: Simplify right side
    18,618.98x = 152,846,419.04
  5. Step 5: Solve for x
    x = 152,846,419.04/18,618.98
  6. Step 6: Final answer
    x = 8,209.17

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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.