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Finding the Third Proportional to 20,990 and 24,830

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Solution

The third proportional to 20,990 and 24,830 is: 29,372.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990 : 24,830 = 24,830 : x
  2. Step 2: Convert to fraction form
    20,990/24,830 = 24,830/x
  3. Step 3: Cross multiply
    20,990x = 24,830 × 24,830
  4. Step 4: Simplify right side
    20,990x = 616,528,900
  5. Step 5: Solve for x
    x = 616,528,900/20,990
  6. Step 6: Final answer
    x = 29,372.51

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.