Home / 3,121.13-4,699.89-2,305.13

Finding the Fourth Proportional to 3,121.13, 4,699.89 and 2,305.13

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Solution

The fourth proportional to 3,121.13, 4,699.89 and 2,305.13 is: 3,471.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.13 : 4,699.89 = 2,305.13 : x
  2. Step 2: Convert to fraction form
    3,121.13/4,699.89 = 2,305.13/x
  3. Step 3: Cross multiply
    3,121.13x = 4,699.89 × 2,305.13
  4. Step 4: Simplify right side
    3,121.13x = 10,833,833.94
  5. Step 5: Solve for x
    x = 10,833,833.94/3,121.13
  6. Step 6: Final answer
    x = 3,471.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.