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Finding the Fourth Proportional to 11,909.92, 17,863.60 and 4,890.66

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Solution

The fourth proportional to 11,909.92, 17,863.60 and 4,890.66 is: 7,335.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,909.92 : 17,863.60 = 4,890.66 : x
  2. Step 2: Convert to fraction form
    11,909.92/17,863.60 = 4,890.66/x
  3. Step 3: Cross multiply
    11,909.92x = 17,863.60 × 4,890.66
  4. Step 4: Simplify right side
    11,909.92x = 87,364,793.98
  5. Step 5: Solve for x
    x = 87,364,793.98/11,909.92
  6. Step 6: Final answer
    x = 7,335.46

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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.