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Finding the Fourth Proportional to 20,603.82, 30,907.56 and 11,239.82

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Solution

The fourth proportional to 20,603.82, 30,907.56 and 11,239.82 is: 16,860.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.82 : 30,907.56 = 11,239.82 : x
  2. Step 2: Convert to fraction form
    20,603.82/30,907.56 = 11,239.82/x
  3. Step 3: Cross multiply
    20,603.82x = 30,907.56 × 11,239.82
  4. Step 4: Simplify right side
    20,603.82x = 347,395,351.33
  5. Step 5: Solve for x
    x = 347,395,351.33/20,603.82
  6. Step 6: Final answer
    x = 16,860.72

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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.