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Finding the Fourth Proportional to 8,392.80, 12,579.84 and 3,456.48

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Solution

The fourth proportional to 8,392.80, 12,579.84 and 3,456.48 is: 5,180.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,392.80 : 12,579.84 = 3,456.48 : x
  2. Step 2: Convert to fraction form
    8,392.80/12,579.84 = 3,456.48/x
  3. Step 3: Cross multiply
    8,392.80x = 12,579.84 × 3,456.48
  4. Step 4: Simplify right side
    8,392.80x = 43,481,965.36
  5. Step 5: Solve for x
    x = 43,481,965.36/8,392.80
  6. Step 6: Final answer
    x = 5,180.87

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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.