Home / 16,879.20-25,318.80-12,942.60

Finding the Fourth Proportional to 16,879.20, 25,318.80 and 12,942.60

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Solution

The fourth proportional to 16,879.20, 25,318.80 and 12,942.60 is: 19,413.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,879.20 : 25,318.80 = 12,942.60 : x
  2. Step 2: Convert to fraction form
    16,879.20/25,318.80 = 12,942.60/x
  3. Step 3: Cross multiply
    16,879.20x = 25,318.80 × 12,942.60
  4. Step 4: Simplify right side
    16,879.20x = 327,691,100.88
  5. Step 5: Solve for x
    x = 327,691,100.88/16,879.20
  6. Step 6: Final answer
    x = 19,413.90

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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.