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Finding the Third Proportional to 15,670 and 21,282

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Solution

The third proportional to 15,670 and 21,282 is: 28,903.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,670 : 21,282 = 21,282 : x
  2. Step 2: Convert to fraction form
    15,670/21,282 = 21,282/x
  3. Step 3: Cross multiply
    15,670x = 21,282 × 21,282
  4. Step 4: Simplify right side
    15,670x = 452,923,524
  5. Step 5: Solve for x
    x = 452,923,524/15,670
  6. Step 6: Final answer
    x = 28,903.86

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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.