Home / 13,418.31-20,135.65-8,481.15

Finding the Fourth Proportional to 13,418.31, 20,135.65 and 8,481.15

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Solution

The fourth proportional to 13,418.31, 20,135.65 and 8,481.15 is: 12,726.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.31 : 20,135.65 = 8,481.15 : x
  2. Step 2: Convert to fraction form
    13,418.31/20,135.65 = 8,481.15/x
  3. Step 3: Cross multiply
    13,418.31x = 20,135.65 × 8,481.15
  4. Step 4: Simplify right side
    13,418.31x = 170,773,468.00
  5. Step 5: Solve for x
    x = 170,773,468.00/13,418.31
  6. Step 6: Final answer
    x = 12,726.90

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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.