Home / 20,121.92-27,768.69-11,169.29

Finding the Fourth Proportional to 20,121.92, 27,768.69 and 11,169.29

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Solution

The fourth proportional to 20,121.92, 27,768.69 and 11,169.29 is: 15,413.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.92 : 27,768.69 = 11,169.29 : x
  2. Step 2: Convert to fraction form
    20,121.92/27,768.69 = 11,169.29/x
  3. Step 3: Cross multiply
    20,121.92x = 27,768.69 × 11,169.29
  4. Step 4: Simplify right side
    20,121.92x = 310,156,412.69
  5. Step 5: Solve for x
    x = 310,156,412.69/20,121.92
  6. Step 6: Final answer
    x = 15,413.86

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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.