Home / 3,855.88-5,321.14-2,087.50

Finding the Fourth Proportional to 3,855.88, 5,321.14 and 2,087.50

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Solution

The fourth proportional to 3,855.88, 5,321.14 and 2,087.50 is: 2,880.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.88 : 5,321.14 = 2,087.50 : x
  2. Step 2: Convert to fraction form
    3,855.88/5,321.14 = 2,087.50/x
  3. Step 3: Cross multiply
    3,855.88x = 5,321.14 × 2,087.50
  4. Step 4: Simplify right side
    3,855.88x = 11,107,879.75
  5. Step 5: Solve for x
    x = 11,107,879.75/3,855.88
  6. Step 6: Final answer
    x = 2,880.76

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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.