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Finding the Third Proportional to 20,439 and 30,777

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Solution

The third proportional to 20,439 and 30,777 is: 46,343.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439 : 30,777 = 30,777 : x
  2. Step 2: Convert to fraction form
    20,439/30,777 = 30,777/x
  3. Step 3: Cross multiply
    20,439x = 30,777 × 30,777
  4. Step 4: Simplify right side
    20,439x = 947,223,729
  5. Step 5: Solve for x
    x = 947,223,729/20,439
  6. Step 6: Final answer
    x = 46,343.94

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.