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Finding the Fourth Proportional to 11,761.12, 16,230.24 and 6,455.92

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Solution

The fourth proportional to 11,761.12, 16,230.24 and 6,455.92 is: 8,909.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,761.12 : 16,230.24 = 6,455.92 : x
  2. Step 2: Convert to fraction form
    11,761.12/16,230.24 = 6,455.92/x
  3. Step 3: Cross multiply
    11,761.12x = 16,230.24 × 6,455.92
  4. Step 4: Simplify right side
    11,761.12x = 104,781,131.02
  5. Step 5: Solve for x
    x = 104,781,131.02/11,761.12
  6. Step 6: Final answer
    x = 8,909.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.