Home / 7,658.28-11,487.78-2,660.72

Finding the Fourth Proportional to 7,658.28, 11,487.78 and 2,660.72

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Solution

The fourth proportional to 7,658.28, 11,487.78 and 2,660.72 is: 3,991.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,658.28 : 11,487.78 = 2,660.72 : x
  2. Step 2: Convert to fraction form
    7,658.28/11,487.78 = 2,660.72/x
  3. Step 3: Cross multiply
    7,658.28x = 11,487.78 × 2,660.72
  4. Step 4: Simplify right side
    7,658.28x = 30,565,708.56
  5. Step 5: Solve for x
    x = 30,565,708.56/7,658.28
  6. Step 6: Final answer
    x = 3,991.20

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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.