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Finding the Third Proportional to 9,889 and 21,505

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Solution

The third proportional to 9,889 and 21,505 is: 46,765.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,889 : 21,505 = 21,505 : x
  2. Step 2: Convert to fraction form
    9,889/21,505 = 21,505/x
  3. Step 3: Cross multiply
    9,889x = 21,505 × 21,505
  4. Step 4: Simplify right side
    9,889x = 462,465,025
  5. Step 5: Solve for x
    x = 462,465,025/9,889
  6. Step 6: Final answer
    x = 46,765.60

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.