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Finding the Fourth Proportional to 5,709.87, 7,879.46 and 3,191.99

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Solution

The fourth proportional to 5,709.87, 7,879.46 and 3,191.99 is: 4,404.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,709.87 : 7,879.46 = 3,191.99 : x
  2. Step 2: Convert to fraction form
    5,709.87/7,879.46 = 3,191.99/x
  3. Step 3: Cross multiply
    5,709.87x = 7,879.46 × 3,191.99
  4. Step 4: Simplify right side
    5,709.87x = 25,151,102.17
  5. Step 5: Solve for x
    x = 25,151,102.17/5,709.87
  6. Step 6: Final answer
    x = 4,404.85

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1.5x scale

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.