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Finding the Fourth Proportional to 7,906.72, 10,911.14 and 4,321.60

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Solution

The fourth proportional to 7,906.72, 10,911.14 and 4,321.60 is: 5,963.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,906.72 : 10,911.14 = 4,321.60 : x
  2. Step 2: Convert to fraction form
    7,906.72/10,911.14 = 4,321.60/x
  3. Step 3: Cross multiply
    7,906.72x = 10,911.14 × 4,321.60
  4. Step 4: Simplify right side
    7,906.72x = 47,153,582.62
  5. Step 5: Solve for x
    x = 47,153,582.62/7,906.72
  6. Step 6: Final answer
    x = 5,963.73

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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.