Home / 20,229.12-27,911.68-11,729.92

Finding the Fourth Proportional to 20,229.12, 27,911.68 and 11,729.92

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Solution

The fourth proportional to 20,229.12, 27,911.68 and 11,729.92 is: 16,184.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,229.12 : 27,911.68 = 11,729.92 : x
  2. Step 2: Convert to fraction form
    20,229.12/27,911.68 = 11,729.92/x
  3. Step 3: Cross multiply
    20,229.12x = 27,911.68 × 11,729.92
  4. Step 4: Simplify right side
    20,229.12x = 327,401,773.47
  5. Step 5: Solve for x
    x = 327,401,773.47/20,229.12
  6. Step 6: Final answer
    x = 16,184.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.