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Finding the Fourth Proportional to 8,617.12, 12,891.68 and 8,553.96

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Solution

The fourth proportional to 8,617.12, 12,891.68 and 8,553.96 is: 12,797.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,617.12 : 12,891.68 = 8,553.96 : x
  2. Step 2: Convert to fraction form
    8,617.12/12,891.68 = 8,553.96/x
  3. Step 3: Cross multiply
    8,617.12x = 12,891.68 × 8,553.96
  4. Step 4: Simplify right side
    8,617.12x = 110,274,915.05
  5. Step 5: Solve for x
    x = 110,274,915.05/8,617.12
  6. Step 6: Final answer
    x = 12,797.19

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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.