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Finding the Fourth Proportional to 8,489.39, 12,747.41 and 7,190.18

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Solution

The fourth proportional to 8,489.39, 12,747.41 and 7,190.18 is: 10,796.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489.39 : 12,747.41 = 7,190.18 : x
  2. Step 2: Convert to fraction form
    8,489.39/12,747.41 = 7,190.18/x
  3. Step 3: Cross multiply
    8,489.39x = 12,747.41 × 7,190.18
  4. Step 4: Simplify right side
    8,489.39x = 91,656,126.67
  5. Step 5: Solve for x
    x = 91,656,126.67/8,489.39
  6. Step 6: Final answer
    x = 10,796.55

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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.