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Finding the Third Proportional to 15,782 and 18,536

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Solution

The third proportional to 15,782 and 18,536 is: 21,770.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,782 : 18,536 = 18,536 : x
  2. Step 2: Convert to fraction form
    15,782/18,536 = 18,536/x
  3. Step 3: Cross multiply
    15,782x = 18,536 × 18,536
  4. Step 4: Simplify right side
    15,782x = 343,583,296
  5. Step 5: Solve for x
    x = 343,583,296/15,782
  6. Step 6: Final answer
    x = 21,770.58

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.