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Finding the Fourth Proportional to 16,665.40, 24,979.02 and 7,887.88

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Solution

The fourth proportional to 16,665.40, 24,979.02 and 7,887.88 is: 11,822.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,665.40 : 24,979.02 = 7,887.88 : x
  2. Step 2: Convert to fraction form
    16,665.40/24,979.02 = 7,887.88/x
  3. Step 3: Cross multiply
    16,665.40x = 24,979.02 × 7,887.88
  4. Step 4: Simplify right side
    16,665.40x = 197,031,512.28
  5. Step 5: Solve for x
    x = 197,031,512.28/16,665.40
  6. Step 6: Final answer
    x = 11,822.79

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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.