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Finding the Fourth Proportional to 7,855.78, 11,781.15 and 3,473.14

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Solution

The fourth proportional to 7,855.78, 11,781.15 and 3,473.14 is: 5,208.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.78 : 11,781.15 = 3,473.14 : x
  2. Step 2: Convert to fraction form
    7,855.78/11,781.15 = 3,473.14/x
  3. Step 3: Cross multiply
    7,855.78x = 11,781.15 × 3,473.14
  4. Step 4: Simplify right side
    7,855.78x = 40,917,583.31
  5. Step 5: Solve for x
    x = 40,917,583.31/7,855.78
  6. Step 6: Final answer
    x = 5,208.60

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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.