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Finding the Fourth Proportional to 3,765, 5,642.11 and 2,118.09

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Solution

The fourth proportional to 3,765, 5,642.11 and 2,118.09 is: 3,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,765 : 5,642.11 = 2,118.09 : x
  2. Step 2: Convert to fraction form
    3,765/5,642.11 = 2,118.09/x
  3. Step 3: Cross multiply
    3,765x = 5,642.11 × 2,118.09
  4. Step 4: Simplify right side
    3,765x = 11,950,496.77
  5. Step 5: Solve for x
    x = 11,950,496.77/3,765
  6. Step 6: Final answer
    x = 3,174.10

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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.