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Finding the Third Proportional to 8,970 and 21,705

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Solution

The third proportional to 8,970 and 21,705 is: 52,520.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,970 : 21,705 = 21,705 : x
  2. Step 2: Convert to fraction form
    8,970/21,705 = 21,705/x
  3. Step 3: Cross multiply
    8,970x = 21,705 × 21,705
  4. Step 4: Simplify right side
    8,970x = 471,107,025
  5. Step 5: Solve for x
    x = 471,107,025/8,970
  6. Step 6: Final answer
    x = 52,520.29

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.