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Finding the Third Proportional to 9,918 and 20,658

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Solution

The third proportional to 9,918 and 20,658 is: 43,028.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918 : 20,658 = 20,658 : x
  2. Step 2: Convert to fraction form
    9,918/20,658 = 20,658/x
  3. Step 3: Cross multiply
    9,918x = 20,658 × 20,658
  4. Step 4: Simplify right side
    9,918x = 426,752,964
  5. Step 5: Solve for x
    x = 426,752,964/9,918
  6. Step 6: Final answer
    x = 43,028.13

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.