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Finding the Fourth Proportional to 18,321.14, 27,481.74 and 6,631.64

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Solution

The fourth proportional to 18,321.14, 27,481.74 and 6,631.64 is: 9,947.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321.14 : 27,481.74 = 6,631.64 : x
  2. Step 2: Convert to fraction form
    18,321.14/27,481.74 = 6,631.64/x
  3. Step 3: Cross multiply
    18,321.14x = 27,481.74 × 6,631.64
  4. Step 4: Simplify right side
    18,321.14x = 182,249,006.25
  5. Step 5: Solve for x
    x = 182,249,006.25/18,321.14
  6. Step 6: Final answer
    x = 9,947.47

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1.5x scale

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.