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Finding the Fourth Proportional to 20,375.82, 30,539.22 and 17,693.82

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Solution

The fourth proportional to 20,375.82, 30,539.22 and 17,693.82 is: 26,519.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.82 : 30,539.22 = 17,693.82 : x
  2. Step 2: Convert to fraction form
    20,375.82/30,539.22 = 17,693.82/x
  3. Step 3: Cross multiply
    20,375.82x = 30,539.22 × 17,693.82
  4. Step 4: Simplify right side
    20,375.82x = 540,355,461.62
  5. Step 5: Solve for x
    x = 540,355,461.62/20,375.82
  6. Step 6: Final answer
    x = 26,519.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.