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Finding the Third Proportional to 7,929 and 12,375

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Solution

The third proportional to 7,929 and 12,375 is: 19,313.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,929 : 12,375 = 12,375 : x
  2. Step 2: Convert to fraction form
    7,929/12,375 = 12,375/x
  3. Step 3: Cross multiply
    7,929x = 12,375 × 12,375
  4. Step 4: Simplify right side
    7,929x = 153,140,625
  5. Step 5: Solve for x
    x = 153,140,625/7,929
  6. Step 6: Final answer
    x = 19,313.99

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.