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Finding the Fourth Proportional to 8,049.60, 12,129.24 and 6,620.76

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Solution

The fourth proportional to 8,049.60, 12,129.24 and 6,620.76 is: 9,976.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,049.60 : 12,129.24 = 6,620.76 : x
  2. Step 2: Convert to fraction form
    8,049.60/12,129.24 = 6,620.76/x
  3. Step 3: Cross multiply
    8,049.60x = 12,129.24 × 6,620.76
  4. Step 4: Simplify right side
    8,049.60x = 80,304,787.02
  5. Step 5: Solve for x
    x = 80,304,787.02/8,049.60
  6. Step 6: Final answer
    x = 9,976.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.