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Finding the Third Proportional to 7,786 and 12,395

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Solution

The third proportional to 7,786 and 12,395 is: 19,732.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,786 : 12,395 = 12,395 : x
  2. Step 2: Convert to fraction form
    7,786/12,395 = 12,395/x
  3. Step 3: Cross multiply
    7,786x = 12,395 × 12,395
  4. Step 4: Simplify right side
    7,786x = 153,636,025
  5. Step 5: Solve for x
    x = 153,636,025/7,786
  6. Step 6: Final answer
    x = 19,732.34

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.