Home / 20,806.68-28,713.28-11,375.32

Finding the Fourth Proportional to 20,806.68, 28,713.28 and 11,375.32

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Solution

The fourth proportional to 20,806.68, 28,713.28 and 11,375.32 is: 15,697.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.68 : 28,713.28 = 11,375.32 : x
  2. Step 2: Convert to fraction form
    20,806.68/28,713.28 = 11,375.32/x
  3. Step 3: Cross multiply
    20,806.68x = 28,713.28 × 11,375.32
  4. Step 4: Simplify right side
    20,806.68x = 326,622,748.25
  5. Step 5: Solve for x
    x = 326,622,748.25/20,806.68
  6. Step 6: Final answer
    x = 15,697.98

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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.