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Finding the Fourth Proportional to 18,138.15, 25,039.44 and 12,167.64

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Solution

The fourth proportional to 18,138.15, 25,039.44 and 12,167.64 is: 16,797.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.15 : 25,039.44 = 12,167.64 : x
  2. Step 2: Convert to fraction form
    18,138.15/25,039.44 = 12,167.64/x
  3. Step 3: Cross multiply
    18,138.15x = 25,039.44 × 12,167.64
  4. Step 4: Simplify right side
    18,138.15x = 304,670,891.72
  5. Step 5: Solve for x
    x = 304,670,891.72/18,138.15
  6. Step 6: Final answer
    x = 16,797.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.