Home / 3,912.65-5,399.38-2,420.17

Finding the Fourth Proportional to 3,912.65, 5,399.38 and 2,420.17

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Solution

The fourth proportional to 3,912.65, 5,399.38 and 2,420.17 is: 3,339.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.65 : 5,399.38 = 2,420.17 : x
  2. Step 2: Convert to fraction form
    3,912.65/5,399.38 = 2,420.17/x
  3. Step 3: Cross multiply
    3,912.65x = 5,399.38 × 2,420.17
  4. Step 4: Simplify right side
    3,912.65x = 13,067,430.99
  5. Step 5: Solve for x
    x = 13,067,430.99/3,912.65
  6. Step 6: Final answer
    x = 3,339.79

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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.