Home / 20,806.80-28,714.26-11,375.96

Finding the Fourth Proportional to 20,806.80, 28,714.26 and 11,375.96

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Solution

The fourth proportional to 20,806.80, 28,714.26 and 11,375.96 is: 15,699.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.80 : 28,714.26 = 11,375.96 : x
  2. Step 2: Convert to fraction form
    20,806.80/28,714.26 = 11,375.96/x
  3. Step 3: Cross multiply
    20,806.80x = 28,714.26 × 11,375.96
  4. Step 4: Simplify right side
    20,806.80x = 326,652,273.19
  5. Step 5: Solve for x
    x = 326,652,273.19/20,806.80
  6. Step 6: Final answer
    x = 15,699.30

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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.