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Finding the Third Proportional to 8,686 and 18,461

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Solution

The third proportional to 8,686 and 18,461 is: 39,236.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686 : 18,461 = 18,461 : x
  2. Step 2: Convert to fraction form
    8,686/18,461 = 18,461/x
  3. Step 3: Cross multiply
    8,686x = 18,461 × 18,461
  4. Step 4: Simplify right side
    8,686x = 340,808,521
  5. Step 5: Solve for x
    x = 340,808,521/8,686
  6. Step 6: Final answer
    x = 39,236.53

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.