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Finding the Fourth Proportional to 3,786.70, 5,225.11 and 2,107.87

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Solution

The fourth proportional to 3,786.70, 5,225.11 and 2,107.87 is: 2,908.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.70 : 5,225.11 = 2,107.87 : x
  2. Step 2: Convert to fraction form
    3,786.70/5,225.11 = 2,107.87/x
  3. Step 3: Cross multiply
    3,786.70x = 5,225.11 × 2,107.87
  4. Step 4: Simplify right side
    3,786.70x = 11,013,863.67
  5. Step 5: Solve for x
    x = 11,013,863.67/3,786.70
  6. Step 6: Final answer
    x = 2,908.57

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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.