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Finding the Third Proportional to 8,619 and 11,358

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Solution

The third proportional to 8,619 and 11,358 is: 14,967.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619 : 11,358 = 11,358 : x
  2. Step 2: Convert to fraction form
    8,619/11,358 = 11,358/x
  3. Step 3: Cross multiply
    8,619x = 11,358 × 11,358
  4. Step 4: Simplify right side
    8,619x = 129,004,164
  5. Step 5: Solve for x
    x = 129,004,164/8,619
  6. Step 6: Final answer
    x = 14,967.42

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.