Home / 20,481.28-28,272.88-13,770.80

Finding the Fourth Proportional to 20,481.28, 28,272.88 and 13,770.80

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Solution

The fourth proportional to 20,481.28, 28,272.88 and 13,770.80 is: 19,009.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.28 : 28,272.88 = 13,770.80 : x
  2. Step 2: Convert to fraction form
    20,481.28/28,272.88 = 13,770.80/x
  3. Step 3: Cross multiply
    20,481.28x = 28,272.88 × 13,770.80
  4. Step 4: Simplify right side
    20,481.28x = 389,340,175.90
  5. Step 5: Solve for x
    x = 389,340,175.90/20,481.28
  6. Step 6: Final answer
    x = 19,009.56

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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.