Home / 3,868.86-5,338.75-2,190.46

Finding the Fourth Proportional to 3,868.86, 5,338.75 and 2,190.46

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Solution

The fourth proportional to 3,868.86, 5,338.75 and 2,190.46 is: 3,022.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.86 : 5,338.75 = 2,190.46 : x
  2. Step 2: Convert to fraction form
    3,868.86/5,338.75 = 2,190.46/x
  3. Step 3: Cross multiply
    3,868.86x = 5,338.75 × 2,190.46
  4. Step 4: Simplify right side
    3,868.86x = 11,694,318.33
  5. Step 5: Solve for x
    x = 11,694,318.33/3,868.86
  6. Step 6: Final answer
    x = 3,022.68

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Half scale
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Double scale
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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.