Home / 20,839.22-28,757.40-11,889.62

Finding the Fourth Proportional to 20,839.22, 28,757.40 and 11,889.62

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Solution

The fourth proportional to 20,839.22, 28,757.40 and 11,889.62 is: 16,407.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.22 : 28,757.40 = 11,889.62 : x
  2. Step 2: Convert to fraction form
    20,839.22/28,757.40 = 11,889.62/x
  3. Step 3: Cross multiply
    20,839.22x = 28,757.40 × 11,889.62
  4. Step 4: Simplify right side
    20,839.22x = 341,914,414.40
  5. Step 5: Solve for x
    x = 341,914,414.40/20,839.22
  6. Step 6: Final answer
    x = 16,407.26

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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.