Home / 20,806.50-28,712.97-11,375.13

Finding the Fourth Proportional to 20,806.50, 28,712.97 and 11,375.13

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Solution

The fourth proportional to 20,806.50, 28,712.97 and 11,375.13 is: 15,697.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.50 : 28,712.97 = 11,375.13 : x
  2. Step 2: Convert to fraction form
    20,806.50/28,712.97 = 11,375.13/x
  3. Step 3: Cross multiply
    20,806.50x = 28,712.97 × 11,375.13
  4. Step 4: Simplify right side
    20,806.50x = 326,613,766.44
  5. Step 5: Solve for x
    x = 326,613,766.44/20,806.50
  6. Step 6: Final answer
    x = 15,697.68

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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.