Home / 20,765.28-28,656-11,333.88

Finding the Fourth Proportional to 20,765.28, 28,656 and 11,333.88

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Solution

The fourth proportional to 20,765.28, 28,656 and 11,333.88 is: 15,640.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.28 : 28,656 = 11,333.88 : x
  2. Step 2: Convert to fraction form
    20,765.28/28,656 = 11,333.88/x
  3. Step 3: Cross multiply
    20,765.28x = 28,656 × 11,333.88
  4. Step 4: Simplify right side
    20,765.28x = 324,783,665.28
  5. Step 5: Solve for x
    x = 324,783,665.28/20,765.28
  6. Step 6: Final answer
    x = 15,640.71

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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.