Home / 3,928.70-5,422.08-2,250.65

Finding the Fourth Proportional to 3,928.70, 5,422.08 and 2,250.65

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Solution

The fourth proportional to 3,928.70, 5,422.08 and 2,250.65 is: 3,106.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.70 : 5,422.08 = 2,250.65 : x
  2. Step 2: Convert to fraction form
    3,928.70/5,422.08 = 2,250.65/x
  3. Step 3: Cross multiply
    3,928.70x = 5,422.08 × 2,250.65
  4. Step 4: Simplify right side
    3,928.70x = 12,203,204.35
  5. Step 5: Solve for x
    x = 12,203,204.35/3,928.70
  6. Step 6: Final answer
    x = 3,106.17

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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.