Home / 3,912.68-5,399.60-2,400.21

Finding the Fourth Proportional to 3,912.68, 5,399.60 and 2,400.21

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Solution

The fourth proportional to 3,912.68, 5,399.60 and 2,400.21 is: 3,312.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.68 : 5,399.60 = 2,400.21 : x
  2. Step 2: Convert to fraction form
    3,912.68/5,399.60 = 2,400.21/x
  3. Step 3: Cross multiply
    3,912.68x = 5,399.60 × 2,400.21
  4. Step 4: Simplify right side
    3,912.68x = 12,960,161.91
  5. Step 5: Solve for x
    x = 12,960,161.91/3,912.68
  6. Step 6: Final answer
    x = 3,312.35

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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.