Home / 5,439.78-8,161.90-2,155.23

Finding the Fourth Proportional to 5,439.78, 8,161.90 and 2,155.23

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Solution

The fourth proportional to 5,439.78, 8,161.90 and 2,155.23 is: 3,233.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,439.78 : 8,161.90 = 2,155.23 : x
  2. Step 2: Convert to fraction form
    5,439.78/8,161.90 = 2,155.23/x
  3. Step 3: Cross multiply
    5,439.78x = 8,161.90 × 2,155.23
  4. Step 4: Simplify right side
    5,439.78x = 17,590,766.35
  5. Step 5: Solve for x
    x = 17,590,766.35/5,439.78
  6. Step 6: Final answer
    x = 3,233.73

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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.