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Finding the Third Proportional to 13,704 and 21,787

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Solution

The third proportional to 13,704 and 21,787 is: 34,637.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,704 : 21,787 = 21,787 : x
  2. Step 2: Convert to fraction form
    13,704/21,787 = 21,787/x
  3. Step 3: Cross multiply
    13,704x = 21,787 × 21,787
  4. Step 4: Simplify right side
    13,704x = 474,673,369
  5. Step 5: Solve for x
    x = 474,673,369/13,704
  6. Step 6: Final answer
    x = 34,637.58

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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.