Home / 20,115.76-27,755.70-12,158.43

Finding the Fourth Proportional to 20,115.76, 27,755.70 and 12,158.43

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Solution

The fourth proportional to 20,115.76, 27,755.70 and 12,158.43 is: 16,776.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.76 : 27,755.70 = 12,158.43 : x
  2. Step 2: Convert to fraction form
    20,115.76/27,755.70 = 12,158.43/x
  3. Step 3: Cross multiply
    20,115.76x = 27,755.70 × 12,158.43
  4. Step 4: Simplify right side
    20,115.76x = 337,465,735.55
  5. Step 5: Solve for x
    x = 337,465,735.55/20,115.76
  6. Step 6: Final answer
    x = 16,776.19

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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.