Home / 3,928.68-5,423.34-2,438.64

Finding the Fourth Proportional to 3,928.68, 5,423.34 and 2,438.64

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Solution

The fourth proportional to 3,928.68, 5,423.34 and 2,438.64 is: 3,366.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.68 : 5,423.34 = 2,438.64 : x
  2. Step 2: Convert to fraction form
    3,928.68/5,423.34 = 2,438.64/x
  3. Step 3: Cross multiply
    3,928.68x = 5,423.34 × 2,438.64
  4. Step 4: Simplify right side
    3,928.68x = 13,225,573.86
  5. Step 5: Solve for x
    x = 13,225,573.86/3,928.68
  6. Step 6: Final answer
    x = 3,366.42

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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.