Home / 20,806.63-28,713.25-11,375.19

Finding the Fourth Proportional to 20,806.63, 28,713.25 and 11,375.19

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Solution

The fourth proportional to 20,806.63, 28,713.25 and 11,375.19 is: 15,697.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.63 : 28,713.25 = 11,375.19 : x
  2. Step 2: Convert to fraction form
    20,806.63/28,713.25 = 11,375.19/x
  3. Step 3: Cross multiply
    20,806.63x = 28,713.25 × 11,375.19
  4. Step 4: Simplify right side
    20,806.63x = 326,618,617.39
  5. Step 5: Solve for x
    x = 326,618,617.39/20,806.63
  6. Step 6: Final answer
    x = 15,697.82

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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.