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Finding the Third Proportional to 1,921 and 4,934

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Solution

The third proportional to 1,921 and 4,934 is: 12,672.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921 : 4,934 = 4,934 : x
  2. Step 2: Convert to fraction form
    1,921/4,934 = 4,934/x
  3. Step 3: Cross multiply
    1,921x = 4,934 × 4,934
  4. Step 4: Simplify right side
    1,921x = 24,344,356
  5. Step 5: Solve for x
    x = 24,344,356/1,921
  6. Step 6: Final answer
    x = 12,672.75

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Why These Related Problems?

These problems maintain the same ratio (2.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.