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Finding the Fourth Proportional to 18,464.78, 27,689.87 and 6,771.62

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Solution

The fourth proportional to 18,464.78, 27,689.87 and 6,771.62 is: 10,154.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,464.78 : 27,689.87 = 6,771.62 : x
  2. Step 2: Convert to fraction form
    18,464.78/27,689.87 = 6,771.62/x
  3. Step 3: Cross multiply
    18,464.78x = 27,689.87 × 6,771.62
  4. Step 4: Simplify right side
    18,464.78x = 187,505,105.18
  5. Step 5: Solve for x
    x = 187,505,105.18/18,464.78
  6. Step 6: Final answer
    x = 10,154.75

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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.