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Finding the Third Proportional to 9,936 and 21,816

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Solution

The third proportional to 9,936 and 21,816 is: 47,900.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,936 : 21,816 = 21,816 : x
  2. Step 2: Convert to fraction form
    9,936/21,816 = 21,816/x
  3. Step 3: Cross multiply
    9,936x = 21,816 × 21,816
  4. Step 4: Simplify right side
    9,936x = 475,937,856
  5. Step 5: Solve for x
    x = 475,937,856/9,936
  6. Step 6: Final answer
    x = 47,900.35

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.