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Finding the Third Proportional to 4,974 and 7,981

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Solution

The third proportional to 4,974 and 7,981 is: 12,805.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,974 : 7,981 = 7,981 : x
  2. Step 2: Convert to fraction form
    4,974/7,981 = 7,981/x
  3. Step 3: Cross multiply
    4,974x = 7,981 × 7,981
  4. Step 4: Simplify right side
    4,974x = 63,696,361
  5. Step 5: Solve for x
    x = 63,696,361/4,974
  6. Step 6: Final answer
    x = 12,805.86

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.