Home / 5,431.38-8,141.40-2,511.60

Finding the Fourth Proportional to 5,431.38, 8,141.40 and 2,511.60

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Solution

The fourth proportional to 5,431.38, 8,141.40 and 2,511.60 is: 3,764.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.38 : 8,141.40 = 2,511.60 : x
  2. Step 2: Convert to fraction form
    5,431.38/8,141.40 = 2,511.60/x
  3. Step 3: Cross multiply
    5,431.38x = 8,141.40 × 2,511.60
  4. Step 4: Simplify right side
    5,431.38x = 20,447,940.24
  5. Step 5: Solve for x
    x = 20,447,940.24/5,431.38
  6. Step 6: Final answer
    x = 3,764.78

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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.