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Finding the Third Proportional to 20,220 and 40,986

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Solution

The third proportional to 20,220 and 40,986 is: 83,078.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220 : 40,986 = 40,986 : x
  2. Step 2: Convert to fraction form
    20,220/40,986 = 40,986/x
  3. Step 3: Cross multiply
    20,220x = 40,986 × 40,986
  4. Step 4: Simplify right side
    20,220x = 1,679,852,196
  5. Step 5: Solve for x
    x = 1,679,852,196/20,220
  6. Step 6: Final answer
    x = 83,078.74

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.