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Finding the Fourth Proportional to 8,857.76, 12,229.92 and 5,879.79

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Solution

The fourth proportional to 8,857.76, 12,229.92 and 5,879.79 is: 8,118.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,857.76 : 12,229.92 = 5,879.79 : x
  2. Step 2: Convert to fraction form
    8,857.76/12,229.92 = 5,879.79/x
  3. Step 3: Cross multiply
    8,857.76x = 12,229.92 × 5,879.79
  4. Step 4: Simplify right side
    8,857.76x = 71,909,361.32
  5. Step 5: Solve for x
    x = 71,909,361.32/8,857.76
  6. Step 6: Final answer
    x = 8,118.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.