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Finding the Third Proportional to 7,191.75 and 8,731

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Solution

The third proportional to 7,191.75 and 8,731 is: 10,599.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.75 : 8,731 = 8,731 : x
  2. Step 2: Convert to fraction form
    7,191.75/8,731 = 8,731/x
  3. Step 3: Cross multiply
    7,191.75x = 8,731 × 8,731
  4. Step 4: Simplify right side
    7,191.75x = 76,230,361
  5. Step 5: Solve for x
    x = 76,230,361/7,191.75
  6. Step 6: Final answer
    x = 10,599.70

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.