Home / 3,909.40-5,393.68-2,396.40

Finding the Fourth Proportional to 3,909.40, 5,393.68 and 2,396.40

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Solution

The fourth proportional to 3,909.40, 5,393.68 and 2,396.40 is: 3,306.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.40 : 5,393.68 = 2,396.40 : x
  2. Step 2: Convert to fraction form
    3,909.40/5,393.68 = 2,396.40/x
  3. Step 3: Cross multiply
    3,909.40x = 5,393.68 × 2,396.40
  4. Step 4: Simplify right side
    3,909.40x = 12,925,414.75
  5. Step 5: Solve for x
    x = 12,925,414.75/3,909.40
  6. Step 6: Final answer
    x = 3,306.24

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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.