Home / 3,857.40-5,322.91-2,178.97

Finding the Fourth Proportional to 3,857.40, 5,322.91 and 2,178.97

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Solution

The fourth proportional to 3,857.40, 5,322.91 and 2,178.97 is: 3,006.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.40 : 5,322.91 = 2,178.97 : x
  2. Step 2: Convert to fraction form
    3,857.40/5,322.91 = 2,178.97/x
  3. Step 3: Cross multiply
    3,857.40x = 5,322.91 × 2,178.97
  4. Step 4: Simplify right side
    3,857.40x = 11,598,461.20
  5. Step 5: Solve for x
    x = 11,598,461.20/3,857.40
  6. Step 6: Final answer
    x = 3,006.81

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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.