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Finding the Third Proportional to 3,931 and 7,313

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Solution

The third proportional to 3,931 and 7,313 is: 13,604.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931 : 7,313 = 7,313 : x
  2. Step 2: Convert to fraction form
    3,931/7,313 = 7,313/x
  3. Step 3: Cross multiply
    3,931x = 7,313 × 7,313
  4. Step 4: Simplify right side
    3,931x = 53,479,969
  5. Step 5: Solve for x
    x = 53,479,969/3,931
  6. Step 6: Final answer
    x = 13,604.67

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Why These Related Problems?

These problems maintain the same ratio (1.86) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.