Home / 3,856.80-5,322.57-2,178.48

Finding the Fourth Proportional to 3,856.80, 5,322.57 and 2,178.48

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Solution

The fourth proportional to 3,856.80, 5,322.57 and 2,178.48 is: 3,006.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.80 : 5,322.57 = 2,178.48 : x
  2. Step 2: Convert to fraction form
    3,856.80/5,322.57 = 2,178.48/x
  3. Step 3: Cross multiply
    3,856.80x = 5,322.57 × 2,178.48
  4. Step 4: Simplify right side
    3,856.80x = 11,595,112.29
  5. Step 5: Solve for x
    x = 11,595,112.29/3,856.80
  6. Step 6: Final answer
    x = 3,006.41

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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.