Home / 12,251.28-18,378.58-3,928.54

Finding the Fourth Proportional to 12,251.28, 18,378.58 and 3,928.54

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Solution

The fourth proportional to 12,251.28, 18,378.58 and 3,928.54 is: 5,893.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,251.28 : 18,378.58 = 3,928.54 : x
  2. Step 2: Convert to fraction form
    12,251.28/18,378.58 = 3,928.54/x
  3. Step 3: Cross multiply
    12,251.28x = 18,378.58 × 3,928.54
  4. Step 4: Simplify right side
    12,251.28x = 72,200,986.67
  5. Step 5: Solve for x
    x = 72,200,986.67/12,251.28
  6. Step 6: Final answer
    x = 5,893.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.