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Finding the Third Proportional to 9,872 and 19,888

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Solution

The third proportional to 9,872 and 19,888 is: 40,066.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,872 : 19,888 = 19,888 : x
  2. Step 2: Convert to fraction form
    9,872/19,888 = 19,888/x
  3. Step 3: Cross multiply
    9,872x = 19,888 × 19,888
  4. Step 4: Simplify right side
    9,872x = 395,532,544
  5. Step 5: Solve for x
    x = 395,532,544/9,872
  6. Step 6: Final answer
    x = 40,066.10

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Why These Related Problems?

These problems maintain the same ratio (2.01) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.