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Finding the Fourth Proportional to 7,482, 10,321.92 and 5,123.28

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Solution

The fourth proportional to 7,482, 10,321.92 and 5,123.28 is: 7,067.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,482 : 10,321.92 = 5,123.28 : x
  2. Step 2: Convert to fraction form
    7,482/10,321.92 = 5,123.28/x
  3. Step 3: Cross multiply
    7,482x = 10,321.92 × 5,123.28
  4. Step 4: Simplify right side
    7,482x = 52,882,086.30
  5. Step 5: Solve for x
    x = 52,882,086.30/7,482
  6. Step 6: Final answer
    x = 7,067.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.