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Finding the Fourth Proportional to 11,978.45, 17,975.88 and 4,187.27

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Solution

The fourth proportional to 11,978.45, 17,975.88 and 4,187.27 is: 6,283.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978.45 : 17,975.88 = 4,187.27 : x
  2. Step 2: Convert to fraction form
    11,978.45/17,975.88 = 4,187.27/x
  3. Step 3: Cross multiply
    11,978.45x = 17,975.88 × 4,187.27
  4. Step 4: Simplify right side
    11,978.45x = 75,269,863.05
  5. Step 5: Solve for x
    x = 75,269,863.05/11,978.45
  6. Step 6: Final answer
    x = 6,283.77

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.