Home / 20,432.90-28,197.42-11,480.39

Finding the Fourth Proportional to 20,432.90, 28,197.42 and 11,480.39

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Solution

The fourth proportional to 20,432.90, 28,197.42 and 11,480.39 is: 15,842.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.90 : 28,197.42 = 11,480.39 : x
  2. Step 2: Convert to fraction form
    20,432.90/28,197.42 = 11,480.39/x
  3. Step 3: Cross multiply
    20,432.90x = 28,197.42 × 11,480.39
  4. Step 4: Simplify right side
    20,432.90x = 323,717,420.39
  5. Step 5: Solve for x
    x = 323,717,420.39/20,432.90
  6. Step 6: Final answer
    x = 15,842.95

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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.