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Finding the Fourth Proportional to 17,986.60, 26,979.90 and 5,674.60

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Solution

The fourth proportional to 17,986.60, 26,979.90 and 5,674.60 is: 8,511.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,986.60 : 26,979.90 = 5,674.60 : x
  2. Step 2: Convert to fraction form
    17,986.60/26,979.90 = 5,674.60/x
  3. Step 3: Cross multiply
    17,986.60x = 26,979.90 × 5,674.60
  4. Step 4: Simplify right side
    17,986.60x = 153,100,140.54
  5. Step 5: Solve for x
    x = 153,100,140.54/17,986.60
  6. Step 6: Final answer
    x = 8,511.90

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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.