Home / 3,780.38-5,215.23-2,520.20

Finding the Fourth Proportional to 3,780.38, 5,215.23 and 2,520.20

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Solution

The fourth proportional to 3,780.38, 5,215.23 and 2,520.20 is: 3,476.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.38 : 5,215.23 = 2,520.20 : x
  2. Step 2: Convert to fraction form
    3,780.38/5,215.23 = 2,520.20/x
  3. Step 3: Cross multiply
    3,780.38x = 5,215.23 × 2,520.20
  4. Step 4: Simplify right side
    3,780.38x = 13,143,396.57
  5. Step 5: Solve for x
    x = 13,143,396.57/3,780.38
  6. Step 6: Final answer
    x = 3,476.74

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Half scale
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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.