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Finding the Fourth Proportional to 3,816, 5,265.74 and 2,136.87

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Solution

The fourth proportional to 3,816, 5,265.74 and 2,136.87 is: 2,948.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,816 : 5,265.74 = 2,136.87 : x
  2. Step 2: Convert to fraction form
    3,816/5,265.74 = 2,136.87/x
  3. Step 3: Cross multiply
    3,816x = 5,265.74 × 2,136.87
  4. Step 4: Simplify right side
    3,816x = 11,252,207.18
  5. Step 5: Solve for x
    x = 11,252,207.18/3,816
  6. Step 6: Final answer
    x = 2,948.69

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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.