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Finding the Third Proportional to 21,678 and 46,580

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Solution

The third proportional to 21,678 and 46,580 is: 100,087.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,678 : 46,580 = 46,580 : x
  2. Step 2: Convert to fraction form
    21,678/46,580 = 46,580/x
  3. Step 3: Cross multiply
    21,678x = 46,580 × 46,580
  4. Step 4: Simplify right side
    21,678x = 2,169,696,400
  5. Step 5: Solve for x
    x = 2,169,696,400/21,678
  6. Step 6: Final answer
    x = 100,087.48

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.