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Finding the Third Proportional to 21,319.50 and 29,821

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Solution

The third proportional to 21,319.50 and 29,821 is: 41,712.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.50 : 29,821 = 29,821 : x
  2. Step 2: Convert to fraction form
    21,319.50/29,821 = 29,821/x
  3. Step 3: Cross multiply
    21,319.50x = 29,821 × 29,821
  4. Step 4: Simplify right side
    21,319.50x = 889,292,041
  5. Step 5: Solve for x
    x = 889,292,041/21,319.50
  6. Step 6: Final answer
    x = 41,712.61

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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.