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Finding the Third Proportional to 3,911 and 7,471

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Solution

The third proportional to 3,911 and 7,471 is: 14,271.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911 : 7,471 = 7,471 : x
  2. Step 2: Convert to fraction form
    3,911/7,471 = 7,471/x
  3. Step 3: Cross multiply
    3,911x = 7,471 × 7,471
  4. Step 4: Simplify right side
    3,911x = 55,815,841
  5. Step 5: Solve for x
    x = 55,815,841/3,911
  6. Step 6: Final answer
    x = 14,271.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.