Home / 20,120.67-27,757.89-12,158.28

Finding the Fourth Proportional to 20,120.67, 27,757.89 and 12,158.28

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Solution

The fourth proportional to 20,120.67, 27,757.89 and 12,158.28 is: 16,773.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.67 : 27,757.89 = 12,158.28 : x
  2. Step 2: Convert to fraction form
    20,120.67/27,757.89 = 12,158.28/x
  3. Step 3: Cross multiply
    20,120.67x = 27,757.89 × 12,158.28
  4. Step 4: Simplify right side
    20,120.67x = 337,488,198.83
  5. Step 5: Solve for x
    x = 337,488,198.83/20,120.67
  6. Step 6: Final answer
    x = 16,773.21

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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.