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Finding the Third Proportional to 11,718 and 20,520

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Solution

The third proportional to 11,718 and 20,520 is: 35,933.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,718 : 20,520 = 20,520 : x
  2. Step 2: Convert to fraction form
    11,718/20,520 = 20,520/x
  3. Step 3: Cross multiply
    11,718x = 20,520 × 20,520
  4. Step 4: Simplify right side
    11,718x = 421,070,400
  5. Step 5: Solve for x
    x = 421,070,400/11,718
  6. Step 6: Final answer
    x = 35,933.64

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.