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Finding the Third Proportional to 8,618 and 18,790

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Solution

The third proportional to 8,618 and 18,790 is: 40,968.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618 : 18,790 = 18,790 : x
  2. Step 2: Convert to fraction form
    8,618/18,790 = 18,790/x
  3. Step 3: Cross multiply
    8,618x = 18,790 × 18,790
  4. Step 4: Simplify right side
    8,618x = 353,064,100
  5. Step 5: Solve for x
    x = 353,064,100/8,618
  6. Step 6: Final answer
    x = 40,968.22

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.