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Finding the Fourth Proportional to 9,928.92, 14,887.68 and 7,676.64

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Solution

The fourth proportional to 9,928.92, 14,887.68 and 7,676.64 is: 11,510.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,928.92 : 14,887.68 = 7,676.64 : x
  2. Step 2: Convert to fraction form
    9,928.92/14,887.68 = 7,676.64/x
  3. Step 3: Cross multiply
    9,928.92x = 14,887.68 × 7,676.64
  4. Step 4: Simplify right side
    9,928.92x = 114,287,359.80
  5. Step 5: Solve for x
    x = 114,287,359.80/9,928.92
  6. Step 6: Final answer
    x = 11,510.55

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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.