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Finding the Third Proportional to 13,686 and 29,928

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Solution

The third proportional to 13,686 and 29,928 is: 65,445.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686 : 29,928 = 29,928 : x
  2. Step 2: Convert to fraction form
    13,686/29,928 = 29,928/x
  3. Step 3: Cross multiply
    13,686x = 29,928 × 29,928
  4. Step 4: Simplify right side
    13,686x = 895,685,184
  5. Step 5: Solve for x
    x = 895,685,184/13,686
  6. Step 6: Final answer
    x = 65,445.36

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.