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Finding the Third Proportional to 3,905 and 7,945

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Solution

The third proportional to 3,905 and 7,945 is: 16,164.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905 : 7,945 = 7,945 : x
  2. Step 2: Convert to fraction form
    3,905/7,945 = 7,945/x
  3. Step 3: Cross multiply
    3,905x = 7,945 × 7,945
  4. Step 4: Simplify right side
    3,905x = 63,123,025
  5. Step 5: Solve for x
    x = 63,123,025/3,905
  6. Step 6: Final answer
    x = 16,164.67

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.