Home / 7,781.18-11,665.25-3,395.30

Finding the Fourth Proportional to 7,781.18, 11,665.25 and 3,395.30

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Solution

The fourth proportional to 7,781.18, 11,665.25 and 3,395.30 is: 5,090.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.18 : 11,665.25 = 3,395.30 : x
  2. Step 2: Convert to fraction form
    7,781.18/11,665.25 = 3,395.30/x
  3. Step 3: Cross multiply
    7,781.18x = 11,665.25 × 3,395.30
  4. Step 4: Simplify right side
    7,781.18x = 39,607,006.35
  5. Step 5: Solve for x
    x = 39,607,006.35/7,781.18
  6. Step 6: Final answer
    x = 5,090.10

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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.