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Finding the Third Proportional to 21,040 and 29,620

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Solution

The third proportional to 21,040 and 29,620 is: 41,698.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040 : 29,620 = 29,620 : x
  2. Step 2: Convert to fraction form
    21,040/29,620 = 29,620/x
  3. Step 3: Cross multiply
    21,040x = 29,620 × 29,620
  4. Step 4: Simplify right side
    21,040x = 877,344,400
  5. Step 5: Solve for x
    x = 877,344,400/21,040
  6. Step 6: Final answer
    x = 41,698.88

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.