Home / 5,169.87-7,138.43-3,972.96

Finding the Fourth Proportional to 5,169.87, 7,138.43 and 3,972.96

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Solution

The fourth proportional to 5,169.87, 7,138.43 and 3,972.96 is: 5,485.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,169.87 : 7,138.43 = 3,972.96 : x
  2. Step 2: Convert to fraction form
    5,169.87/7,138.43 = 3,972.96/x
  3. Step 3: Cross multiply
    5,169.87x = 7,138.43 × 3,972.96
  4. Step 4: Simplify right side
    5,169.87x = 28,360,676.99
  5. Step 5: Solve for x
    x = 28,360,676.99/5,169.87
  6. Step 6: Final answer
    x = 5,485.76

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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.