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Finding the Third Proportional to 20,686 and 28,842

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Solution

The third proportional to 20,686 and 28,842 is: 40,213.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686 : 28,842 = 28,842 : x
  2. Step 2: Convert to fraction form
    20,686/28,842 = 28,842/x
  3. Step 3: Cross multiply
    20,686x = 28,842 × 28,842
  4. Step 4: Simplify right side
    20,686x = 831,860,964
  5. Step 5: Solve for x
    x = 831,860,964/20,686
  6. Step 6: Final answer
    x = 40,213.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.