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Finding the Third Proportional to 8,520 and 11,856

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Solution

The third proportional to 8,520 and 11,856 is: 16,498.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520 : 11,856 = 11,856 : x
  2. Step 2: Convert to fraction form
    8,520/11,856 = 11,856/x
  3. Step 3: Cross multiply
    8,520x = 11,856 × 11,856
  4. Step 4: Simplify right side
    8,520x = 140,564,736
  5. Step 5: Solve for x
    x = 140,564,736/8,520
  6. Step 6: Final answer
    x = 16,498.21

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.