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Finding the Third Proportional to 21,322 and 29,815

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Solution

The third proportional to 21,322 and 29,815 is: 41,690.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322 : 29,815 = 29,815 : x
  2. Step 2: Convert to fraction form
    21,322/29,815 = 29,815/x
  3. Step 3: Cross multiply
    21,322x = 29,815 × 29,815
  4. Step 4: Simplify right side
    21,322x = 888,934,225
  5. Step 5: Solve for x
    x = 888,934,225/21,322
  6. Step 6: Final answer
    x = 41,690.94

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.