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Finding the Third Proportional to 9,821 and 15,231

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Solution

The third proportional to 9,821 and 15,231 is: 23,621.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,821 : 15,231 = 15,231 : x
  2. Step 2: Convert to fraction form
    9,821/15,231 = 15,231/x
  3. Step 3: Cross multiply
    9,821x = 15,231 × 15,231
  4. Step 4: Simplify right side
    9,821x = 231,983,361
  5. Step 5: Solve for x
    x = 231,983,361/9,821
  6. Step 6: Final answer
    x = 23,621.15

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.