Home / 20,680.38-28,539.12-11,248.95

Finding the Fourth Proportional to 20,680.38, 28,539.12 and 11,248.95

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Solution

The fourth proportional to 20,680.38, 28,539.12 and 11,248.95 is: 15,523.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.38 : 28,539.12 = 11,248.95 : x
  2. Step 2: Convert to fraction form
    20,680.38/28,539.12 = 11,248.95/x
  3. Step 3: Cross multiply
    20,680.38x = 28,539.12 × 11,248.95
  4. Step 4: Simplify right side
    20,680.38x = 321,035,133.92
  5. Step 5: Solve for x
    x = 321,035,133.92/20,680.38
  6. Step 6: Final answer
    x = 15,523.66

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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.