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Finding the Third Proportional to 20,972 and 43,656

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Solution

The third proportional to 20,972 and 43,656 is: 90,875.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972 : 43,656 = 43,656 : x
  2. Step 2: Convert to fraction form
    20,972/43,656 = 43,656/x
  3. Step 3: Cross multiply
    20,972x = 43,656 × 43,656
  4. Step 4: Simplify right side
    20,972x = 1,905,846,336
  5. Step 5: Solve for x
    x = 1,905,846,336/20,972
  6. Step 6: Final answer
    x = 90,875.76

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.