Home / 5,177.72-7,145.40-2,819.90

Finding the Fourth Proportional to 5,177.72, 7,145.40 and 2,819.90

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Solution

The fourth proportional to 5,177.72, 7,145.40 and 2,819.90 is: 3,891.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,177.72 : 7,145.40 = 2,819.90 : x
  2. Step 2: Convert to fraction form
    5,177.72/7,145.40 = 2,819.90/x
  3. Step 3: Cross multiply
    5,177.72x = 7,145.40 × 2,819.90
  4. Step 4: Simplify right side
    5,177.72x = 20,149,313.46
  5. Step 5: Solve for x
    x = 20,149,313.46/5,177.72
  6. Step 6: Final answer
    x = 3,891.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.