Home / 20,930.94-31,396.32-7,603.89

Finding the Fourth Proportional to 20,930.94, 31,396.32 and 7,603.89

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Solution

The fourth proportional to 20,930.94, 31,396.32 and 7,603.89 is: 11,405.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.94 : 31,396.32 = 7,603.89 : x
  2. Step 2: Convert to fraction form
    20,930.94/31,396.32 = 7,603.89/x
  3. Step 3: Cross multiply
    20,930.94x = 31,396.32 × 7,603.89
  4. Step 4: Simplify right side
    20,930.94x = 238,734,163.68
  5. Step 5: Solve for x
    x = 238,734,163.68/20,930.94
  6. Step 6: Final answer
    x = 11,405.80

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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.