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Finding the Fourth Proportional to 8,610.75, 11,879.79 and 5,628.31

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Solution

The fourth proportional to 8,610.75, 11,879.79 and 5,628.31 is: 7,765.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,610.75 : 11,879.79 = 5,628.31 : x
  2. Step 2: Convert to fraction form
    8,610.75/11,879.79 = 5,628.31/x
  3. Step 3: Cross multiply
    8,610.75x = 11,879.79 × 5,628.31
  4. Step 4: Simplify right side
    8,610.75x = 66,863,090.05
  5. Step 5: Solve for x
    x = 66,863,090.05/8,610.75
  6. Step 6: Final answer
    x = 7,765.07

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.