Home / 20,679.82-31,002.18-8,208.66

Finding the Fourth Proportional to 20,679.82, 31,002.18 and 8,208.66

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Solution

The fourth proportional to 20,679.82, 31,002.18 and 8,208.66 is: 12,306.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.82 : 31,002.18 = 8,208.66 : x
  2. Step 2: Convert to fraction form
    20,679.82/31,002.18 = 8,208.66/x
  3. Step 3: Cross multiply
    20,679.82x = 31,002.18 × 8,208.66
  4. Step 4: Simplify right side
    20,679.82x = 254,486,354.88
  5. Step 5: Solve for x
    x = 254,486,354.88/20,679.82
  6. Step 6: Final answer
    x = 12,306.02

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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.