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Finding the Third Proportional to 8,210 and 8,978

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Solution

The third proportional to 8,210 and 8,978 is: 9,817.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,210 : 8,978 = 8,978 : x
  2. Step 2: Convert to fraction form
    8,210/8,978 = 8,978/x
  3. Step 3: Cross multiply
    8,210x = 8,978 × 8,978
  4. Step 4: Simplify right side
    8,210x = 80,604,484
  5. Step 5: Solve for x
    x = 80,604,484/8,210
  6. Step 6: Final answer
    x = 9,817.84

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.