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Finding the Third Proportional to 7,911 and 11,845.13

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Solution

The third proportional to 7,911 and 11,845.13 is: 17,735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911 : 11,845.13 = 11,845.13 : x
  2. Step 2: Convert to fraction form
    7,911/11,845.13 = 11,845.13/x
  3. Step 3: Cross multiply
    7,911x = 11,845.13 × 11,845.13
  4. Step 4: Simplify right side
    7,911x = 140,306,986.27
  5. Step 5: Solve for x
    x = 140,306,986.27/7,911
  6. Step 6: Final answer
    x = 17,735.68

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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.