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Finding the Fourth Proportional to 8,393.88, 12,579.87 and 3,458.55

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Solution

The fourth proportional to 8,393.88, 12,579.87 and 3,458.55 is: 5,183.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,393.88 : 12,579.87 = 3,458.55 : x
  2. Step 2: Convert to fraction form
    8,393.88/12,579.87 = 3,458.55/x
  3. Step 3: Cross multiply
    8,393.88x = 12,579.87 × 3,458.55
  4. Step 4: Simplify right side
    8,393.88x = 43,508,109.39
  5. Step 5: Solve for x
    x = 43,508,109.39/8,393.88
  6. Step 6: Final answer
    x = 5,183.31

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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.