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Finding the Fourth Proportional to 8,481.82, 12,723.94 and 2,639.02

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Solution

The fourth proportional to 8,481.82, 12,723.94 and 2,639.02 is: 3,958.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,481.82 : 12,723.94 = 2,639.02 : x
  2. Step 2: Convert to fraction form
    8,481.82/12,723.94 = 2,639.02/x
  3. Step 3: Cross multiply
    8,481.82x = 12,723.94 × 2,639.02
  4. Step 4: Simplify right side
    8,481.82x = 33,578,732.14
  5. Step 5: Solve for x
    x = 33,578,732.14/8,481.82
  6. Step 6: Final answer
    x = 3,958.91

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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.