Home / 13,540.30-20,314.80-6,519.39

Finding the Fourth Proportional to 13,540.30, 20,314.80 and 6,519.39

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Solution

The fourth proportional to 13,540.30, 20,314.80 and 6,519.39 is: 9,781.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.30 : 20,314.80 = 6,519.39 : x
  2. Step 2: Convert to fraction form
    13,540.30/20,314.80 = 6,519.39/x
  3. Step 3: Cross multiply
    13,540.30x = 20,314.80 × 6,519.39
  4. Step 4: Simplify right side
    13,540.30x = 132,440,103.97
  5. Step 5: Solve for x
    x = 132,440,103.97/13,540.30
  6. Step 6: Final answer
    x = 9,781.18

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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.