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Finding the Third Proportional to 20,572 and 27,878

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Solution

The third proportional to 20,572 and 27,878 is: 37,778.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572 : 27,878 = 27,878 : x
  2. Step 2: Convert to fraction form
    20,572/27,878 = 27,878/x
  3. Step 3: Cross multiply
    20,572x = 27,878 × 27,878
  4. Step 4: Simplify right side
    20,572x = 777,182,884
  5. Step 5: Solve for x
    x = 777,182,884/20,572
  6. Step 6: Final answer
    x = 37,778.67

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.