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Finding the Third Proportional to 7,624 and 11,976

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Solution

The third proportional to 7,624 and 11,976 is: 18,812.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,624 : 11,976 = 11,976 : x
  2. Step 2: Convert to fraction form
    7,624/11,976 = 11,976/x
  3. Step 3: Cross multiply
    7,624x = 11,976 × 11,976
  4. Step 4: Simplify right side
    7,624x = 143,424,576
  5. Step 5: Solve for x
    x = 143,424,576/7,624
  6. Step 6: Final answer
    x = 18,812.25

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.