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Finding the Third Proportional to 21,152 and 31,112

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Solution

The third proportional to 21,152 and 31,112 is: 45,761.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152 : 31,112 = 31,112 : x
  2. Step 2: Convert to fraction form
    21,152/31,112 = 31,112/x
  3. Step 3: Cross multiply
    21,152x = 31,112 × 31,112
  4. Step 4: Simplify right side
    21,152x = 967,956,544
  5. Step 5: Solve for x
    x = 967,956,544/21,152
  6. Step 6: Final answer
    x = 45,761.94

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.