Home / 3,857.35-5,323.24-2,178.79

Finding the Fourth Proportional to 3,857.35, 5,323.24 and 2,178.79

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Solution

The fourth proportional to 3,857.35, 5,323.24 and 2,178.79 is: 3,006.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.35 : 5,323.24 = 2,178.79 : x
  2. Step 2: Convert to fraction form
    3,857.35/5,323.24 = 2,178.79/x
  3. Step 3: Cross multiply
    3,857.35x = 5,323.24 × 2,178.79
  4. Step 4: Simplify right side
    3,857.35x = 11,598,222.08
  5. Step 5: Solve for x
    x = 11,598,222.08/3,857.35
  6. Step 6: Final answer
    x = 3,006.78

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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.