Home / 8,639.20-12,958.38-2,715.92

Finding the Fourth Proportional to 8,639.20, 12,958.38 and 2,715.92

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Solution

The fourth proportional to 8,639.20, 12,958.38 and 2,715.92 is: 4,073.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.20 : 12,958.38 = 2,715.92 : x
  2. Step 2: Convert to fraction form
    8,639.20/12,958.38 = 2,715.92/x
  3. Step 3: Cross multiply
    8,639.20x = 12,958.38 × 2,715.92
  4. Step 4: Simplify right side
    8,639.20x = 35,193,923.41
  5. Step 5: Solve for x
    x = 35,193,923.41/8,639.20
  6. Step 6: Final answer
    x = 4,073.75

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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.