Home / 3,105.95-4,658.92-2,129.09

Finding the Fourth Proportional to 3,105.95, 4,658.92 and 2,129.09

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Solution

The fourth proportional to 3,105.95, 4,658.92 and 2,129.09 is: 3,193.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.95 : 4,658.92 = 2,129.09 : x
  2. Step 2: Convert to fraction form
    3,105.95/4,658.92 = 2,129.09/x
  3. Step 3: Cross multiply
    3,105.95x = 4,658.92 × 2,129.09
  4. Step 4: Simplify right side
    3,105.95x = 9,919,242.51
  5. Step 5: Solve for x
    x = 9,919,242.51/3,105.95
  6. Step 6: Final answer
    x = 3,193.63

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Double scale
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Similar ratio
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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.