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Finding the Fourth Proportional to 12,558, 17,327.12 and 7,521.28

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Solution

The fourth proportional to 12,558, 17,327.12 and 7,521.28 is: 10,377.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,558 : 17,327.12 = 7,521.28 : x
  2. Step 2: Convert to fraction form
    12,558/17,327.12 = 7,521.28/x
  3. Step 3: Cross multiply
    12,558x = 17,327.12 × 7,521.28
  4. Step 4: Simplify right side
    12,558x = 130,322,121.11
  5. Step 5: Solve for x
    x = 130,322,121.11/12,558
  6. Step 6: Final answer
    x = 10,377.62

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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.