Home / 3,168.90-4,372.38-1,989.54

Finding the Fourth Proportional to 3,168.90, 4,372.38 and 1,989.54

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Solution

The fourth proportional to 3,168.90, 4,372.38 and 1,989.54 is: 2,745.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.90 : 4,372.38 = 1,989.54 : x
  2. Step 2: Convert to fraction form
    3,168.90/4,372.38 = 1,989.54/x
  3. Step 3: Cross multiply
    3,168.90x = 4,372.38 × 1,989.54
  4. Step 4: Simplify right side
    3,168.90x = 8,699,024.91
  5. Step 5: Solve for x
    x = 8,699,024.91/3,168.90
  6. Step 6: Final answer
    x = 2,745.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.