Home / 3,928.80-5,887.84-2,171.21

Finding the Fourth Proportional to 3,928.80, 5,887.84 and 2,171.21

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Solution

The fourth proportional to 3,928.80, 5,887.84 and 2,171.21 is: 3,253.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.80 : 5,887.84 = 2,171.21 : x
  2. Step 2: Convert to fraction form
    3,928.80/5,887.84 = 2,171.21/x
  3. Step 3: Cross multiply
    3,928.80x = 5,887.84 × 2,171.21
  4. Step 4: Simplify right side
    3,928.80x = 12,783,706.29
  5. Step 5: Solve for x
    x = 12,783,706.29/3,928.80
  6. Step 6: Final answer
    x = 3,253.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.