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Finding the Fourth Proportional to 8,608.97, 12,921.57 and 4,229.57

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Solution

The fourth proportional to 8,608.97, 12,921.57 and 4,229.57 is: 6,348.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.97 : 12,921.57 = 4,229.57 : x
  2. Step 2: Convert to fraction form
    8,608.97/12,921.57 = 4,229.57/x
  3. Step 3: Cross multiply
    8,608.97x = 12,921.57 × 4,229.57
  4. Step 4: Simplify right side
    8,608.97x = 54,652,717.13
  5. Step 5: Solve for x
    x = 54,652,717.13/8,608.97
  6. Step 6: Final answer
    x = 6,348.34

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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.