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Finding the Fourth Proportional to 11,399.20, 17,101.20 and 3,608.80

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Solution

The fourth proportional to 11,399.20, 17,101.20 and 3,608.80 is: 5,413.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,399.20 : 17,101.20 = 3,608.80 : x
  2. Step 2: Convert to fraction form
    11,399.20/17,101.20 = 3,608.80/x
  3. Step 3: Cross multiply
    11,399.20x = 17,101.20 × 3,608.80
  4. Step 4: Simplify right side
    11,399.20x = 61,714,810.56
  5. Step 5: Solve for x
    x = 61,714,810.56/11,399.20
  6. Step 6: Final answer
    x = 5,413.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.