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Finding the Fourth Proportional to 8,630.67, 12,881.97 and 7,439.61

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Solution

The fourth proportional to 8,630.67, 12,881.97 and 7,439.61 is: 11,104.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.67 : 12,881.97 = 7,439.61 : x
  2. Step 2: Convert to fraction form
    8,630.67/12,881.97 = 7,439.61/x
  3. Step 3: Cross multiply
    8,630.67x = 12,881.97 × 7,439.61
  4. Step 4: Simplify right side
    8,630.67x = 95,836,832.83
  5. Step 5: Solve for x
    x = 95,836,832.83/8,630.67
  6. Step 6: Final answer
    x = 11,104.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.