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Finding the Third Proportional to 18,771.19 and 28,101.09

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Solution

The third proportional to 18,771.19 and 28,101.09 is: 42,068.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.19 : 28,101.09 = 28,101.09 : x
  2. Step 2: Convert to fraction form
    18,771.19/28,101.09 = 28,101.09/x
  3. Step 3: Cross multiply
    18,771.19x = 28,101.09 × 28,101.09
  4. Step 4: Simplify right side
    18,771.19x = 789,671,469.95
  5. Step 5: Solve for x
    x = 789,671,469.95/18,771.19
  6. Step 6: Final answer
    x = 42,068.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.