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Finding the Fourth Proportional to 8,187.76, 12,282.42 and 2,639.62

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Solution

The fourth proportional to 8,187.76, 12,282.42 and 2,639.62 is: 3,959.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,187.76 : 12,282.42 = 2,639.62 : x
  2. Step 2: Convert to fraction form
    8,187.76/12,282.42 = 2,639.62/x
  3. Step 3: Cross multiply
    8,187.76x = 12,282.42 × 2,639.62
  4. Step 4: Simplify right side
    8,187.76x = 32,420,921.48
  5. Step 5: Solve for x
    x = 32,420,921.48/8,187.76
  6. Step 6: Final answer
    x = 3,959.68

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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.