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Finding the Third Proportional to 20,485 and 43,370

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Solution

The third proportional to 20,485 and 43,370 is: 91,821.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485 : 43,370 = 43,370 : x
  2. Step 2: Convert to fraction form
    20,485/43,370 = 43,370/x
  3. Step 3: Cross multiply
    20,485x = 43,370 × 43,370
  4. Step 4: Simplify right side
    20,485x = 1,880,956,900
  5. Step 5: Solve for x
    x = 1,880,956,900/20,485
  6. Step 6: Final answer
    x = 91,821.18

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.