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Finding the Third Proportional to 5,145 and 7,479

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Solution

The third proportional to 5,145 and 7,479 is: 10,871.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145 : 7,479 = 7,479 : x
  2. Step 2: Convert to fraction form
    5,145/7,479 = 7,479/x
  3. Step 3: Cross multiply
    5,145x = 7,479 × 7,479
  4. Step 4: Simplify right side
    5,145x = 55,935,441
  5. Step 5: Solve for x
    x = 55,935,441/5,145
  6. Step 6: Final answer
    x = 10,871.81

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.