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Finding the Fourth Proportional to 18,612.78, 27,918.94 and 5,464.68

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Solution

The fourth proportional to 18,612.78, 27,918.94 and 5,464.68 is: 8,196.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.78 : 27,918.94 = 5,464.68 : x
  2. Step 2: Convert to fraction form
    18,612.78/27,918.94 = 5,464.68/x
  3. Step 3: Cross multiply
    18,612.78x = 27,918.94 × 5,464.68
  4. Step 4: Simplify right side
    18,612.78x = 152,568,073.04
  5. Step 5: Solve for x
    x = 152,568,073.04/18,612.78
  6. Step 6: Final answer
    x = 8,196.95

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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.