Home / 20,115.39-27,760.05-12,156.06

Finding the Fourth Proportional to 20,115.39, 27,760.05 and 12,156.06

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Solution

The fourth proportional to 20,115.39, 27,760.05 and 12,156.06 is: 16,775.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.39 : 27,760.05 = 12,156.06 : x
  2. Step 2: Convert to fraction form
    20,115.39/27,760.05 = 12,156.06/x
  3. Step 3: Cross multiply
    20,115.39x = 27,760.05 × 12,156.06
  4. Step 4: Simplify right side
    20,115.39x = 337,452,833.40
  5. Step 5: Solve for x
    x = 337,452,833.40/20,115.39
  6. Step 6: Final answer
    x = 16,775.85

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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.