Home / 20,343.97-28,073.90-11,391.02

Finding the Fourth Proportional to 20,343.97, 28,073.90 and 11,391.02

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Solution

The fourth proportional to 20,343.97, 28,073.90 and 11,391.02 is: 15,719.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.97 : 28,073.90 = 11,391.02 : x
  2. Step 2: Convert to fraction form
    20,343.97/28,073.90 = 11,391.02/x
  3. Step 3: Cross multiply
    20,343.97x = 28,073.90 × 11,391.02
  4. Step 4: Simplify right side
    20,343.97x = 319,790,503.96
  5. Step 5: Solve for x
    x = 319,790,503.96/20,343.97
  6. Step 6: Final answer
    x = 15,719.18

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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.