Home / 20,806.90-28,713.48-11,375.46

Finding the Fourth Proportional to 20,806.90, 28,713.48 and 11,375.46

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Solution

The fourth proportional to 20,806.90, 28,713.48 and 11,375.46 is: 15,698.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.90 : 28,713.48 = 11,375.46 : x
  2. Step 2: Convert to fraction form
    20,806.90/28,713.48 = 11,375.46/x
  3. Step 3: Cross multiply
    20,806.90x = 28,713.48 × 11,375.46
  4. Step 4: Simplify right side
    20,806.90x = 326,629,043.20
  5. Step 5: Solve for x
    x = 326,629,043.20/20,806.90
  6. Step 6: Final answer
    x = 15,698.11

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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.