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Finding the Fourth Proportional to 8,607.28, 12,912.14 and 2,761.92

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Solution

The fourth proportional to 8,607.28, 12,912.14 and 2,761.92 is: 4,143.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.28 : 12,912.14 = 2,761.92 : x
  2. Step 2: Convert to fraction form
    8,607.28/12,912.14 = 2,761.92/x
  3. Step 3: Cross multiply
    8,607.28x = 12,912.14 × 2,761.92
  4. Step 4: Simplify right side
    8,607.28x = 35,662,297.71
  5. Step 5: Solve for x
    x = 35,662,297.71/8,607.28
  6. Step 6: Final answer
    x = 4,143.27

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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.