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Finding the Fourth Proportional to 7,380,979.80, 11,071,469.70 and 5,491,411.80

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Solution

The fourth proportional to 7,380,979.80, 11,071,469.70 and 5,491,411.80 is: 8,237,117.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,380,979.80 : 11,071,469.70 = 5,491,411.80 : x
  2. Step 2: Convert to fraction form
    7,380,979.80/11,071,469.70 = 5,491,411.80/x
  3. Step 3: Cross multiply
    7,380,979.80x = 11,071,469.70 × 5,491,411.80
  4. Step 4: Simplify right side
    7,380,979.80x = 60,797,999,353,922.45
  5. Step 5: Solve for x
    x = 60,797,999,353,922.45/7,380,979.80
  6. Step 6: Final answer
    x = 8,237,117.70

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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.