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Finding the Third Proportional to 20,881 and 31,331.50

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Solution

The third proportional to 20,881 and 31,331.50 is: 47,012.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881 : 31,331.50 = 31,331.50 : x
  2. Step 2: Convert to fraction form
    20,881/31,331.50 = 31,331.50/x
  3. Step 3: Cross multiply
    20,881x = 31,331.50 × 31,331.50
  4. Step 4: Simplify right side
    20,881x = 981,662,892.25
  5. Step 5: Solve for x
    x = 981,662,892.25/20,881
  6. Step 6: Final answer
    x = 47,012.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.