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Finding the Fourth Proportional to 8,318.78, 12,472.02 and 3,931.12

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Solution

The fourth proportional to 8,318.78, 12,472.02 and 3,931.12 is: 5,893.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.78 : 12,472.02 = 3,931.12 : x
  2. Step 2: Convert to fraction form
    8,318.78/12,472.02 = 3,931.12/x
  3. Step 3: Cross multiply
    8,318.78x = 12,472.02 × 3,931.12
  4. Step 4: Simplify right side
    8,318.78x = 49,028,976.08
  5. Step 5: Solve for x
    x = 49,028,976.08/8,318.78
  6. Step 6: Final answer
    x = 5,893.77

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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.