Home / 7,887.78-11,837.79-2,961.90

Finding the Fourth Proportional to 7,887.78, 11,837.79 and 2,961.90

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Solution

The fourth proportional to 7,887.78, 11,837.79 and 2,961.90 is: 4,445.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.78 : 11,837.79 = 2,961.90 : x
  2. Step 2: Convert to fraction form
    7,887.78/11,837.79 = 2,961.90/x
  3. Step 3: Cross multiply
    7,887.78x = 11,837.79 × 2,961.90
  4. Step 4: Simplify right side
    7,887.78x = 35,062,350.20
  5. Step 5: Solve for x
    x = 35,062,350.20/7,887.78
  6. Step 6: Final answer
    x = 4,445.15

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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.