Home / 20,539.73-28,344.20-11,587.12

Finding the Fourth Proportional to 20,539.73, 28,344.20 and 11,587.12

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Solution

The fourth proportional to 20,539.73, 28,344.20 and 11,587.12 is: 15,989.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.73 : 28,344.20 = 11,587.12 : x
  2. Step 2: Convert to fraction form
    20,539.73/28,344.20 = 11,587.12/x
  3. Step 3: Cross multiply
    20,539.73x = 28,344.20 × 11,587.12
  4. Step 4: Simplify right side
    20,539.73x = 328,427,517.91
  5. Step 5: Solve for x
    x = 328,427,517.91/20,539.73
  6. Step 6: Final answer
    x = 15,989.86

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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.