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Finding the Fourth Proportional to 7,781.01, 11,665.29 and 3,395.39

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Solution

The fourth proportional to 7,781.01, 11,665.29 and 3,395.39 is: 5,090.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.01 : 11,665.29 = 3,395.39 : x
  2. Step 2: Convert to fraction form
    7,781.01/11,665.29 = 3,395.39/x
  3. Step 3: Cross multiply
    7,781.01x = 11,665.29 × 3,395.39
  4. Step 4: Simplify right side
    7,781.01x = 39,608,252.30
  5. Step 5: Solve for x
    x = 39,608,252.30/7,781.01
  6. Step 6: Final answer
    x = 5,090.37

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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.