Home / 5,431.88-8,147.39-2,145.00

Finding the Fourth Proportional to 5,431.88, 8,147.39 and 2,145.00

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Solution

The fourth proportional to 5,431.88, 8,147.39 and 2,145.00 is: 3,217.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.88 : 8,147.39 = 2,145.00 : x
  2. Step 2: Convert to fraction form
    5,431.88/8,147.39 = 2,145.00/x
  3. Step 3: Cross multiply
    5,431.88x = 8,147.39 × 2,145.00
  4. Step 4: Simplify right side
    5,431.88x = 17,476,171.38
  5. Step 5: Solve for x
    x = 17,476,171.38/5,431.88
  6. Step 6: Final answer
    x = 3,217.33

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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.