Home / 3,910.70-5,396.81-2,142.38

Finding the Fourth Proportional to 3,910.70, 5,396.81 and 2,142.38

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Solution

The fourth proportional to 3,910.70, 5,396.81 and 2,142.38 is: 2,956.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.70 : 5,396.81 = 2,142.38 : x
  2. Step 2: Convert to fraction form
    3,910.70/5,396.81 = 2,142.38/x
  3. Step 3: Cross multiply
    3,910.70x = 5,396.81 × 2,142.38
  4. Step 4: Simplify right side
    3,910.70x = 11,562,017.81
  5. Step 5: Solve for x
    x = 11,562,017.81/3,910.70
  6. Step 6: Final answer
    x = 2,956.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.