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Finding the Fourth Proportional to 7,991.73, 11,989.42 and 2,445.86

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Solution

The fourth proportional to 7,991.73, 11,989.42 and 2,445.86 is: 3,669.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.73 : 11,989.42 = 2,445.86 : x
  2. Step 2: Convert to fraction form
    7,991.73/11,989.42 = 2,445.86/x
  3. Step 3: Cross multiply
    7,991.73x = 11,989.42 × 2,445.86
  4. Step 4: Simplify right side
    7,991.73x = 29,324,442.80
  5. Step 5: Solve for x
    x = 29,324,442.80/7,991.73
  6. Step 6: Final answer
    x = 3,669.35

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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.