Home / 5,438.27-8,154.57-2,660.78

Finding the Fourth Proportional to 5,438.27, 8,154.57 and 2,660.78

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Solution

The fourth proportional to 5,438.27, 8,154.57 and 2,660.78 is: 3,989.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,438.27 : 8,154.57 = 2,660.78 : x
  2. Step 2: Convert to fraction form
    5,438.27/8,154.57 = 2,660.78/x
  3. Step 3: Cross multiply
    5,438.27x = 8,154.57 × 2,660.78
  4. Step 4: Simplify right side
    5,438.27x = 21,697,516.76
  5. Step 5: Solve for x
    x = 21,697,516.76/5,438.27
  6. Step 6: Final answer
    x = 3,989.78

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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.