Home / 3,431.02-5,138.24-1,965.72

Finding the Fourth Proportional to 3,431.02, 5,138.24 and 1,965.72

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Solution

The fourth proportional to 3,431.02, 5,138.24 and 1,965.72 is: 2,943.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.02 : 5,138.24 = 1,965.72 : x
  2. Step 2: Convert to fraction form
    3,431.02/5,138.24 = 1,965.72/x
  3. Step 3: Cross multiply
    3,431.02x = 5,138.24 × 1,965.72
  4. Step 4: Simplify right side
    3,431.02x = 10,100,341.13
  5. Step 5: Solve for x
    x = 10,100,341.13/3,431.02
  6. Step 6: Final answer
    x = 2,943.83

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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.