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Finding the Third Proportional to 21,730 and 30,995

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Solution

The third proportional to 21,730 and 30,995 is: 44,210.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730 : 30,995 = 30,995 : x
  2. Step 2: Convert to fraction form
    21,730/30,995 = 30,995/x
  3. Step 3: Cross multiply
    21,730x = 30,995 × 30,995
  4. Step 4: Simplify right side
    21,730x = 960,690,025
  5. Step 5: Solve for x
    x = 960,690,025/21,730
  6. Step 6: Final answer
    x = 44,210.31

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.