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Finding the Third Proportional to 11,742 and 20,507

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Solution

The third proportional to 11,742 and 20,507 is: 35,814.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,742 : 20,507 = 20,507 : x
  2. Step 2: Convert to fraction form
    11,742/20,507 = 20,507/x
  3. Step 3: Cross multiply
    11,742x = 20,507 × 20,507
  4. Step 4: Simplify right side
    11,742x = 420,537,049
  5. Step 5: Solve for x
    x = 420,537,049/11,742
  6. Step 6: Final answer
    x = 35,814.77

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.