Home / 3,855.96-5,321.21-2,087.56

Finding the Fourth Proportional to 3,855.96, 5,321.21 and 2,087.56

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Solution

The fourth proportional to 3,855.96, 5,321.21 and 2,087.56 is: 2,880.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.96 : 5,321.21 = 2,087.56 : x
  2. Step 2: Convert to fraction form
    3,855.96/5,321.21 = 2,087.56/x
  3. Step 3: Cross multiply
    3,855.96x = 5,321.21 × 2,087.56
  4. Step 4: Simplify right side
    3,855.96x = 11,108,345.15
  5. Step 5: Solve for x
    x = 11,108,345.15/3,855.96
  6. Step 6: Final answer
    x = 2,880.82

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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.