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Finding the Fourth Proportional to 8,571.90, 12,863.31 and 5,728.80

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Solution

The fourth proportional to 8,571.90, 12,863.31 and 5,728.80 is: 8,596.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.90 : 12,863.31 = 5,728.80 : x
  2. Step 2: Convert to fraction form
    8,571.90/12,863.31 = 5,728.80/x
  3. Step 3: Cross multiply
    8,571.90x = 12,863.31 × 5,728.80
  4. Step 4: Simplify right side
    8,571.90x = 73,691,330.33
  5. Step 5: Solve for x
    x = 73,691,330.33/8,571.90
  6. Step 6: Final answer
    x = 8,596.85

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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.