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Finding the Third Proportional to 7,581 and 8,391

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Solution

The third proportional to 7,581 and 8,391 is: 9,287.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,581 : 8,391 = 8,391 : x
  2. Step 2: Convert to fraction form
    7,581/8,391 = 8,391/x
  3. Step 3: Cross multiply
    7,581x = 8,391 × 8,391
  4. Step 4: Simplify right side
    7,581x = 70,408,881
  5. Step 5: Solve for x
    x = 70,408,881/7,581
  6. Step 6: Final answer
    x = 9,287.55

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.