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Finding the Fourth Proportional to 36,719, 50,672.22 and 21,815

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Solution

The fourth proportional to 36,719, 50,672.22 and 21,815 is: 30,104.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,719 : 50,672.22 = 21,815 : x
  2. Step 2: Convert to fraction form
    36,719/50,672.22 = 21,815/x
  3. Step 3: Cross multiply
    36,719x = 50,672.22 × 21,815
  4. Step 4: Simplify right side
    36,719x = 1,105,414,479.30
  5. Step 5: Solve for x
    x = 1,105,414,479.30/36,719
  6. Step 6: Final answer
    x = 30,104.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.