Home / 20,806.88-28,713.12-11,375.36

Finding the Fourth Proportional to 20,806.88, 28,713.12 and 11,375.36

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Solution

The fourth proportional to 20,806.88, 28,713.12 and 11,375.36 is: 15,697.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.88 : 28,713.12 = 11,375.36 : x
  2. Step 2: Convert to fraction form
    20,806.88/28,713.12 = 11,375.36/x
  3. Step 3: Cross multiply
    20,806.88x = 28,713.12 × 11,375.36
  4. Step 4: Simplify right side
    20,806.88x = 326,622,076.72
  5. Step 5: Solve for x
    x = 326,622,076.72/20,806.88
  6. Step 6: Final answer
    x = 15,697.79

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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.