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Finding the Third Proportional to 3,660 and 7,135

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Solution

The third proportional to 3,660 and 7,135 is: 13,909.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,660 : 7,135 = 7,135 : x
  2. Step 2: Convert to fraction form
    3,660/7,135 = 7,135/x
  3. Step 3: Cross multiply
    3,660x = 7,135 × 7,135
  4. Step 4: Simplify right side
    3,660x = 50,908,225
  5. Step 5: Solve for x
    x = 50,908,225/3,660
  6. Step 6: Final answer
    x = 13,909.35

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.