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Finding the Third Proportional to 9,864 and 21,638

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Solution

The third proportional to 9,864 and 21,638 is: 47,465.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,864 : 21,638 = 21,638 : x
  2. Step 2: Convert to fraction form
    9,864/21,638 = 21,638/x
  3. Step 3: Cross multiply
    9,864x = 21,638 × 21,638
  4. Step 4: Simplify right side
    9,864x = 468,203,044
  5. Step 5: Solve for x
    x = 468,203,044/9,864
  6. Step 6: Final answer
    x = 47,465.84

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.