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Finding the Third Proportional to 8,378 and 12,844

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Solution

The third proportional to 8,378 and 12,844 is: 19,690.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378 : 12,844 = 12,844 : x
  2. Step 2: Convert to fraction form
    8,378/12,844 = 12,844/x
  3. Step 3: Cross multiply
    8,378x = 12,844 × 12,844
  4. Step 4: Simplify right side
    8,378x = 164,968,336
  5. Step 5: Solve for x
    x = 164,968,336/8,378
  6. Step 6: Final answer
    x = 19,690.66

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.