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Finding the Fourth Proportional to 8,660.48, 12,961.92 and 6,917.12

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Solution

The fourth proportional to 8,660.48, 12,961.92 and 6,917.12 is: 10,352.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.48 : 12,961.92 = 6,917.12 : x
  2. Step 2: Convert to fraction form
    8,660.48/12,961.92 = 6,917.12/x
  3. Step 3: Cross multiply
    8,660.48x = 12,961.92 × 6,917.12
  4. Step 4: Simplify right side
    8,660.48x = 89,659,156.07
  5. Step 5: Solve for x
    x = 89,659,156.07/8,660.48
  6. Step 6: Final answer
    x = 10,352.68

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1.5x scale

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.