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Finding the Third Proportional to 15,830 and 21,225

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Solution

The third proportional to 15,830 and 21,225 is: 28,458.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,830 : 21,225 = 21,225 : x
  2. Step 2: Convert to fraction form
    15,830/21,225 = 21,225/x
  3. Step 3: Cross multiply
    15,830x = 21,225 × 21,225
  4. Step 4: Simplify right side
    15,830x = 450,500,625
  5. Step 5: Solve for x
    x = 450,500,625/15,830
  6. Step 6: Final answer
    x = 28,458.66

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.