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Finding the Third Proportional to 8,742 and 13,842

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Solution

The third proportional to 8,742 and 13,842 is: 21,917.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,742 : 13,842 = 13,842 : x
  2. Step 2: Convert to fraction form
    8,742/13,842 = 13,842/x
  3. Step 3: Cross multiply
    8,742x = 13,842 × 13,842
  4. Step 4: Simplify right side
    8,742x = 191,600,964
  5. Step 5: Solve for x
    x = 191,600,964/8,742
  6. Step 6: Final answer
    x = 21,917.29

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.