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Finding the Fourth Proportional to 10,811.12, 16,217.60 and 3,413.60

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Solution

The fourth proportional to 10,811.12, 16,217.60 and 3,413.60 is: 5,120.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,811.12 : 16,217.60 = 3,413.60 : x
  2. Step 2: Convert to fraction form
    10,811.12/16,217.60 = 3,413.60/x
  3. Step 3: Cross multiply
    10,811.12x = 16,217.60 × 3,413.60
  4. Step 4: Simplify right side
    10,811.12x = 55,360,399.36
  5. Step 5: Solve for x
    x = 55,360,399.36/10,811.12
  6. Step 6: Final answer
    x = 5,120.69

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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.