Home / 20,122.26-27,768.20-11,169.50

Finding the Fourth Proportional to 20,122.26, 27,768.20 and 11,169.50

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Solution

The fourth proportional to 20,122.26, 27,768.20 and 11,169.50 is: 15,413.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.26 : 27,768.20 = 11,169.50 : x
  2. Step 2: Convert to fraction form
    20,122.26/27,768.20 = 11,169.50/x
  3. Step 3: Cross multiply
    20,122.26x = 27,768.20 × 11,169.50
  4. Step 4: Simplify right side
    20,122.26x = 310,156,909.90
  5. Step 5: Solve for x
    x = 310,156,909.90/20,122.26
  6. Step 6: Final answer
    x = 15,413.62

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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.