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Finding the Third Proportional to 20,028 and 31,176

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Solution

The third proportional to 20,028 and 31,176 is: 48,529.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,028 : 31,176 = 31,176 : x
  2. Step 2: Convert to fraction form
    20,028/31,176 = 31,176/x
  3. Step 3: Cross multiply
    20,028x = 31,176 × 31,176
  4. Step 4: Simplify right side
    20,028x = 971,942,976
  5. Step 5: Solve for x
    x = 971,942,976/20,028
  6. Step 6: Final answer
    x = 48,529.21

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.