Home / 7,660.91-11,485.52-3,960.78

Finding the Fourth Proportional to 7,660.91, 11,485.52 and 3,960.78

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Solution

The fourth proportional to 7,660.91, 11,485.52 and 3,960.78 is: 5,938.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,660.91 : 11,485.52 = 3,960.78 : x
  2. Step 2: Convert to fraction form
    7,660.91/11,485.52 = 3,960.78/x
  3. Step 3: Cross multiply
    7,660.91x = 11,485.52 × 3,960.78
  4. Step 4: Simplify right side
    7,660.91x = 45,491,627.81
  5. Step 5: Solve for x
    x = 45,491,627.81/7,660.91
  6. Step 6: Final answer
    x = 5,938.15

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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.