Home / 20,912.74-28,859.97-11,481.64

Finding the Fourth Proportional to 20,912.74, 28,859.97 and 11,481.64

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Solution

The fourth proportional to 20,912.74, 28,859.97 and 11,481.64 is: 15,844.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.74 : 28,859.97 = 11,481.64 : x
  2. Step 2: Convert to fraction form
    20,912.74/28,859.97 = 11,481.64/x
  3. Step 3: Cross multiply
    20,912.74x = 28,859.97 × 11,481.64
  4. Step 4: Simplify right side
    20,912.74x = 331,359,785.95
  5. Step 5: Solve for x
    x = 331,359,785.95/20,912.74
  6. Step 6: Final answer
    x = 15,844.88

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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.