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Finding the Third Proportional to 8,206 and 12,619

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Solution

The third proportional to 8,206 and 12,619 is: 19,405.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,206 : 12,619 = 12,619 : x
  2. Step 2: Convert to fraction form
    8,206/12,619 = 12,619/x
  3. Step 3: Cross multiply
    8,206x = 12,619 × 12,619
  4. Step 4: Simplify right side
    8,206x = 159,239,161
  5. Step 5: Solve for x
    x = 159,239,161/8,206
  6. Step 6: Final answer
    x = 19,405.21

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.