Home / 3,857.12-5,322.80-2,178.50

Finding the Fourth Proportional to 3,857.12, 5,322.80 and 2,178.50

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Solution

The fourth proportional to 3,857.12, 5,322.80 and 2,178.50 is: 3,006.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.12 : 5,322.80 = 2,178.50 : x
  2. Step 2: Convert to fraction form
    3,857.12/5,322.80 = 2,178.50/x
  3. Step 3: Cross multiply
    3,857.12x = 5,322.80 × 2,178.50
  4. Step 4: Simplify right side
    3,857.12x = 11,595,719.80
  5. Step 5: Solve for x
    x = 11,595,719.80/3,857.12
  6. Step 6: Final answer
    x = 3,006.32

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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.