Home / 3,771.87-5,205.15-2,178.49

Finding the Fourth Proportional to 3,771.87, 5,205.15 and 2,178.49

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Solution

The fourth proportional to 3,771.87, 5,205.15 and 2,178.49 is: 3,006.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,771.87 : 5,205.15 = 2,178.49 : x
  2. Step 2: Convert to fraction form
    3,771.87/5,205.15 = 2,178.49/x
  3. Step 3: Cross multiply
    3,771.87x = 5,205.15 × 2,178.49
  4. Step 4: Simplify right side
    3,771.87x = 11,339,384.74
  5. Step 5: Solve for x
    x = 11,339,384.74/3,771.87
  6. Step 6: Final answer
    x = 3,006.31

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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.