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Finding the Third Proportional to 13,140.38 and 20,919

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Solution

The third proportional to 13,140.38 and 20,919 is: 33,302.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.38 : 20,919 = 20,919 : x
  2. Step 2: Convert to fraction form
    13,140.38/20,919 = 20,919/x
  3. Step 3: Cross multiply
    13,140.38x = 20,919 × 20,919
  4. Step 4: Simplify right side
    13,140.38x = 437,604,561
  5. Step 5: Solve for x
    x = 437,604,561/13,140.38
  6. Step 6: Final answer
    x = 33,302.29

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.