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Finding the Third Proportional to 20,409.75 and 31,536

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Solution

The third proportional to 20,409.75 and 31,536 is: 48,727.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.75 : 31,536 = 31,536 : x
  2. Step 2: Convert to fraction form
    20,409.75/31,536 = 31,536/x
  3. Step 3: Cross multiply
    20,409.75x = 31,536 × 31,536
  4. Step 4: Simplify right side
    20,409.75x = 994,519,296
  5. Step 5: Solve for x
    x = 994,519,296/20,409.75
  6. Step 6: Final answer
    x = 48,727.66

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.