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Finding the Fourth Proportional to 11,240.32, 16,872 and 7,957.12

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Solution

The fourth proportional to 11,240.32, 16,872 and 7,957.12 is: 11,943.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,240.32 : 16,872 = 7,957.12 : x
  2. Step 2: Convert to fraction form
    11,240.32/16,872 = 7,957.12/x
  3. Step 3: Cross multiply
    11,240.32x = 16,872 × 7,957.12
  4. Step 4: Simplify right side
    11,240.32x = 134,252,528.64
  5. Step 5: Solve for x
    x = 134,252,528.64/11,240.32
  6. Step 6: Final answer
    x = 11,943.84

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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.