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Finding the Fourth Proportional to 18,387.78, 27,584.25 and 7,295.60

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Solution

The fourth proportional to 18,387.78, 27,584.25 and 7,295.60 is: 10,944.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,387.78 : 27,584.25 = 7,295.60 : x
  2. Step 2: Convert to fraction form
    18,387.78/27,584.25 = 7,295.60/x
  3. Step 3: Cross multiply
    18,387.78x = 27,584.25 × 7,295.60
  4. Step 4: Simplify right side
    18,387.78x = 201,243,695.90
  5. Step 5: Solve for x
    x = 201,243,695.90/18,387.78
  6. Step 6: Final answer
    x = 10,944.43

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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.