Home / 13,187.78-19,791.20-5,183.73

Finding the Fourth Proportional to 13,187.78, 19,791.20 and 5,183.73

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Solution

The fourth proportional to 13,187.78, 19,791.20 and 5,183.73 is: 7,779.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.78 : 19,791.20 = 5,183.73 : x
  2. Step 2: Convert to fraction form
    13,187.78/19,791.20 = 5,183.73/x
  3. Step 3: Cross multiply
    13,187.78x = 19,791.20 × 5,183.73
  4. Step 4: Simplify right side
    13,187.78x = 102,592,211.26
  5. Step 5: Solve for x
    x = 102,592,211.26/13,187.78
  6. Step 6: Final answer
    x = 7,779.34

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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.