Home / 20,115.38-27,759.96-12,156.06

Finding the Fourth Proportional to 20,115.38, 27,759.96 and 12,156.06

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Solution

The fourth proportional to 20,115.38, 27,759.96 and 12,156.06 is: 16,775.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.38 : 27,759.96 = 12,156.06 : x
  2. Step 2: Convert to fraction form
    20,115.38/27,759.96 = 12,156.06/x
  3. Step 3: Cross multiply
    20,115.38x = 27,759.96 × 12,156.06
  4. Step 4: Simplify right side
    20,115.38x = 337,451,739.36
  5. Step 5: Solve for x
    x = 337,451,739.36/20,115.38
  6. Step 6: Final answer
    x = 16,775.81

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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.