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Finding the Third Proportional to 20,931 and 30,694.50

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Solution

The third proportional to 20,931 and 30,694.50 is: 45,012.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931 : 30,694.50 = 30,694.50 : x
  2. Step 2: Convert to fraction form
    20,931/30,694.50 = 30,694.50/x
  3. Step 3: Cross multiply
    20,931x = 30,694.50 × 30,694.50
  4. Step 4: Simplify right side
    20,931x = 942,152,330.25
  5. Step 5: Solve for x
    x = 942,152,330.25/20,931
  6. Step 6: Final answer
    x = 45,012.29

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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.