Home / 20,126.17-27,765.48-12,163.78

Finding the Fourth Proportional to 20,126.17, 27,765.48 and 12,163.78

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Solution

The fourth proportional to 20,126.17, 27,765.48 and 12,163.78 is: 16,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,126.17 : 27,765.48 = 12,163.78 : x
  2. Step 2: Convert to fraction form
    20,126.17/27,765.48 = 12,163.78/x
  3. Step 3: Cross multiply
    20,126.17x = 27,765.48 × 12,163.78
  4. Step 4: Simplify right side
    20,126.17x = 337,733,190.31
  5. Step 5: Solve for x
    x = 337,733,190.31/20,126.17
  6. Step 6: Final answer
    x = 16,780.80

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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.