Home / 20,829.19-28,744.28-11,397.75

Finding the Fourth Proportional to 20,829.19, 28,744.28 and 11,397.75

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Solution

The fourth proportional to 20,829.19, 28,744.28 and 11,397.75 is: 15,728.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.19 : 28,744.28 = 11,397.75 : x
  2. Step 2: Convert to fraction form
    20,829.19/28,744.28 = 11,397.75/x
  3. Step 3: Cross multiply
    20,829.19x = 28,744.28 × 11,397.75
  4. Step 4: Simplify right side
    20,829.19x = 327,620,103.12
  5. Step 5: Solve for x
    x = 327,620,103.12/20,829.19
  6. Step 6: Final answer
    x = 15,728.90

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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.