Home / 20,105.24-27,745.20-12,145.97

Finding the Fourth Proportional to 20,105.24, 27,745.20 and 12,145.97

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Solution

The fourth proportional to 20,105.24, 27,745.20 and 12,145.97 is: 16,761.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.24 : 27,745.20 = 12,145.97 : x
  2. Step 2: Convert to fraction form
    20,105.24/27,745.20 = 12,145.97/x
  3. Step 3: Cross multiply
    20,105.24x = 27,745.20 × 12,145.97
  4. Step 4: Simplify right side
    20,105.24x = 336,992,436.21
  5. Step 5: Solve for x
    x = 336,992,436.21/20,105.24
  6. Step 6: Final answer
    x = 16,761.43

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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.