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Finding the Third Proportional to 20,372 and 30,423

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Solution

The third proportional to 20,372 and 30,423 is: 45,432.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372 : 30,423 = 30,423 : x
  2. Step 2: Convert to fraction form
    20,372/30,423 = 30,423/x
  3. Step 3: Cross multiply
    20,372x = 30,423 × 30,423
  4. Step 4: Simplify right side
    20,372x = 925,558,929
  5. Step 5: Solve for x
    x = 925,558,929/20,372
  6. Step 6: Final answer
    x = 45,432.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.