Home / 3,431.87-5,143.70-1,581.12

Finding the Fourth Proportional to 3,431.87, 5,143.70 and 1,581.12

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Solution

The fourth proportional to 3,431.87, 5,143.70 and 1,581.12 is: 2,369.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.87 : 5,143.70 = 1,581.12 : x
  2. Step 2: Convert to fraction form
    3,431.87/5,143.70 = 1,581.12/x
  3. Step 3: Cross multiply
    3,431.87x = 5,143.70 × 1,581.12
  4. Step 4: Simplify right side
    3,431.87x = 8,132,810.90
  5. Step 5: Solve for x
    x = 8,132,810.90/3,431.87
  6. Step 6: Final answer
    x = 2,369.79

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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.