Home / 13,321.78-19,982.66-3,961.76

Finding the Fourth Proportional to 13,321.78, 19,982.66 and 3,961.76

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Solution

The fourth proportional to 13,321.78, 19,982.66 and 3,961.76 is: 5,942.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.78 : 19,982.66 = 3,961.76 : x
  2. Step 2: Convert to fraction form
    13,321.78/19,982.66 = 3,961.76/x
  3. Step 3: Cross multiply
    13,321.78x = 19,982.66 × 3,961.76
  4. Step 4: Simplify right side
    13,321.78x = 79,166,403.17
  5. Step 5: Solve for x
    x = 79,166,403.17/13,321.78
  6. Step 6: Final answer
    x = 5,942.63

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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.