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Finding the Fourth Proportional to 7,906.50, 10,911.09 and 4,321.62

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Solution

The fourth proportional to 7,906.50, 10,911.09 and 4,321.62 is: 5,963.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,906.50 : 10,911.09 = 4,321.62 : x
  2. Step 2: Convert to fraction form
    7,906.50/10,911.09 = 4,321.62/x
  3. Step 3: Cross multiply
    7,906.50x = 10,911.09 × 4,321.62
  4. Step 4: Simplify right side
    7,906.50x = 47,153,584.77
  5. Step 5: Solve for x
    x = 47,153,584.77/7,906.50
  6. Step 6: Final answer
    x = 5,963.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.