Home / 20,839.88-28,757.56-11,887.76

Finding the Fourth Proportional to 20,839.88, 28,757.56 and 11,887.76

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Solution

The fourth proportional to 20,839.88, 28,757.56 and 11,887.76 is: 16,404.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.88 : 28,757.56 = 11,887.76 : x
  2. Step 2: Convert to fraction form
    20,839.88/28,757.56 = 11,887.76/x
  3. Step 3: Cross multiply
    20,839.88x = 28,757.56 × 11,887.76
  4. Step 4: Simplify right side
    20,839.88x = 341,862,971.47
  5. Step 5: Solve for x
    x = 341,862,971.47/20,839.88
  6. Step 6: Final answer
    x = 16,404.27

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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.