Home / 3,816.87-5,267.91-2,138.70

Finding the Fourth Proportional to 3,816.87, 5,267.91 and 2,138.70

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Solution

The fourth proportional to 3,816.87, 5,267.91 and 2,138.70 is: 2,951.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,816.87 : 5,267.91 = 2,138.70 : x
  2. Step 2: Convert to fraction form
    3,816.87/5,267.91 = 2,138.70/x
  3. Step 3: Cross multiply
    3,816.87x = 5,267.91 × 2,138.70
  4. Step 4: Simplify right side
    3,816.87x = 11,266,479.12
  5. Step 5: Solve for x
    x = 11,266,479.12/3,816.87
  6. Step 6: Final answer
    x = 2,951.76

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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.