Home / 3,891.20-5,370.38-2,475.03

Finding the Fourth Proportional to 3,891.20, 5,370.38 and 2,475.03

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Solution

The fourth proportional to 3,891.20, 5,370.38 and 2,475.03 is: 3,415.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.20 : 5,370.38 = 2,475.03 : x
  2. Step 2: Convert to fraction form
    3,891.20/5,370.38 = 2,475.03/x
  3. Step 3: Cross multiply
    3,891.20x = 5,370.38 × 2,475.03
  4. Step 4: Simplify right side
    3,891.20x = 13,291,812.38
  5. Step 5: Solve for x
    x = 13,291,812.38/3,891.20
  6. Step 6: Final answer
    x = 3,415.86

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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.