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Finding the Fourth Proportional to 11,187.92, 15,440.56 and 6,472

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Solution

The fourth proportional to 11,187.92, 15,440.56 and 6,472 is: 8,932.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,187.92 : 15,440.56 = 6,472 : x
  2. Step 2: Convert to fraction form
    11,187.92/15,440.56 = 6,472/x
  3. Step 3: Cross multiply
    11,187.92x = 15,440.56 × 6,472
  4. Step 4: Simplify right side
    11,187.92x = 99,931,304.32
  5. Step 5: Solve for x
    x = 99,931,304.32/11,187.92
  6. Step 6: Final answer
    x = 8,932.07

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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.