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Finding the Fourth Proportional to 30,979.80, 46,469.70 and 8,793.90

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Solution

The fourth proportional to 30,979.80, 46,469.70 and 8,793.90 is: 13,190.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,979.80 : 46,469.70 = 8,793.90 : x
  2. Step 2: Convert to fraction form
    30,979.80/46,469.70 = 8,793.90/x
  3. Step 3: Cross multiply
    30,979.80x = 46,469.70 × 8,793.90
  4. Step 4: Simplify right side
    30,979.80x = 408,649,894.83
  5. Step 5: Solve for x
    x = 408,649,894.83/30,979.80
  6. Step 6: Final answer
    x = 13,190.85

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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.