Home / 20,912.82-28,859.79-11,481.38

Finding the Fourth Proportional to 20,912.82, 28,859.79 and 11,481.38

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Solution

The fourth proportional to 20,912.82, 28,859.79 and 11,481.38 is: 15,844.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.82 : 28,859.79 = 11,481.38 : x
  2. Step 2: Convert to fraction form
    20,912.82/28,859.79 = 11,481.38/x
  3. Step 3: Cross multiply
    20,912.82x = 28,859.79 × 11,481.38
  4. Step 4: Simplify right side
    20,912.82x = 331,350,215.71
  5. Step 5: Solve for x
    x = 331,350,215.71/20,912.82
  6. Step 6: Final answer
    x = 15,844.36

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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.