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Finding the Third Proportional to 9,904 and 21,080

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Solution

The third proportional to 9,904 and 21,080 is: 44,867.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,904 : 21,080 = 21,080 : x
  2. Step 2: Convert to fraction form
    9,904/21,080 = 21,080/x
  3. Step 3: Cross multiply
    9,904x = 21,080 × 21,080
  4. Step 4: Simplify right side
    9,904x = 444,366,400
  5. Step 5: Solve for x
    x = 444,366,400/9,904
  6. Step 6: Final answer
    x = 44,867.37

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.