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Finding the Third Proportional to 19,421 and 28,189

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Solution

The third proportional to 19,421 and 28,189 is: 40,915.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,421 : 28,189 = 28,189 : x
  2. Step 2: Convert to fraction form
    19,421/28,189 = 28,189/x
  3. Step 3: Cross multiply
    19,421x = 28,189 × 28,189
  4. Step 4: Simplify right side
    19,421x = 794,619,721
  5. Step 5: Solve for x
    x = 794,619,721/19,421
  6. Step 6: Final answer
    x = 40,915.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.