Home / 3,855.58-5,320.69-2,087.21

Finding the Fourth Proportional to 3,855.58, 5,320.69 and 2,087.21

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Solution

The fourth proportional to 3,855.58, 5,320.69 and 2,087.21 is: 2,880.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.58 : 5,320.69 = 2,087.21 : x
  2. Step 2: Convert to fraction form
    3,855.58/5,320.69 = 2,087.21/x
  3. Step 3: Cross multiply
    3,855.58x = 5,320.69 × 2,087.21
  4. Step 4: Simplify right side
    3,855.58x = 11,105,405.46
  5. Step 5: Solve for x
    x = 11,105,405.46/3,855.58
  6. Step 6: Final answer
    x = 2,880.35

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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.