Home / 3,865.92-5,334.42-2,187.60

Finding the Fourth Proportional to 3,865.92, 5,334.42 and 2,187.60

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Solution

The fourth proportional to 3,865.92, 5,334.42 and 2,187.60 is: 3,018.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.92 : 5,334.42 = 2,187.60 : x
  2. Step 2: Convert to fraction form
    3,865.92/5,334.42 = 2,187.60/x
  3. Step 3: Cross multiply
    3,865.92x = 5,334.42 × 2,187.60
  4. Step 4: Simplify right side
    3,865.92x = 11,669,577.19
  5. Step 5: Solve for x
    x = 11,669,577.19/3,865.92
  6. Step 6: Final answer
    x = 3,018.58

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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.