Home / 3,850.40-5,313.48-2,171.78

Finding the Fourth Proportional to 3,850.40, 5,313.48 and 2,171.78

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Solution

The fourth proportional to 3,850.40, 5,313.48 and 2,171.78 is: 2,997.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,850.40 : 5,313.48 = 2,171.78 : x
  2. Step 2: Convert to fraction form
    3,850.40/5,313.48 = 2,171.78/x
  3. Step 3: Cross multiply
    3,850.40x = 5,313.48 × 2,171.78
  4. Step 4: Simplify right side
    3,850.40x = 11,539,709.59
  5. Step 5: Solve for x
    x = 11,539,709.59/3,850.40
  6. Step 6: Final answer
    x = 2,997.02

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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.