Home / 3,140.96-4,690.21-2,731.04

Finding the Fourth Proportional to 3,140.96, 4,690.21 and 2,731.04

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Solution

The fourth proportional to 3,140.96, 4,690.21 and 2,731.04 is: 4,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.96 : 4,690.21 = 2,731.04 : x
  2. Step 2: Convert to fraction form
    3,140.96/4,690.21 = 2,731.04/x
  3. Step 3: Cross multiply
    3,140.96x = 4,690.21 × 2,731.04
  4. Step 4: Simplify right side
    3,140.96x = 12,809,151.12
  5. Step 5: Solve for x
    x = 12,809,151.12/3,140.96
  6. Step 6: Final answer
    x = 4,078.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.