Home / 20,679.75-28,538.19-11,248.65

Finding the Fourth Proportional to 20,679.75, 28,538.19 and 11,248.65

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Solution

The fourth proportional to 20,679.75, 28,538.19 and 11,248.65 is: 15,523.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.75 : 28,538.19 = 11,248.65 : x
  2. Step 2: Convert to fraction form
    20,679.75/28,538.19 = 11,248.65/x
  3. Step 3: Cross multiply
    20,679.75x = 28,538.19 × 11,248.65
  4. Step 4: Simplify right side
    20,679.75x = 321,016,110.94
  5. Step 5: Solve for x
    x = 321,016,110.94/20,679.75
  6. Step 6: Final answer
    x = 15,523.21

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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.