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Finding the Fourth Proportional to 11,129.88, 16,680.96 and 9,739.92

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Solution

The fourth proportional to 11,129.88, 16,680.96 and 9,739.92 is: 14,597.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,129.88 : 16,680.96 = 9,739.92 : x
  2. Step 2: Convert to fraction form
    11,129.88/16,680.96 = 9,739.92/x
  3. Step 3: Cross multiply
    11,129.88x = 16,680.96 × 9,739.92
  4. Step 4: Simplify right side
    11,129.88x = 162,471,215.92
  5. Step 5: Solve for x
    x = 162,471,215.92/11,129.88
  6. Step 6: Final answer
    x = 14,597.75

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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.