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Finding the Fourth Proportional to 18,178.15, 25,084.61 and 10,221.61

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Solution

The fourth proportional to 18,178.15, 25,084.61 and 10,221.61 is: 14,105.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,178.15 : 25,084.61 = 10,221.61 : x
  2. Step 2: Convert to fraction form
    18,178.15/25,084.61 = 10,221.61/x
  3. Step 3: Cross multiply
    18,178.15x = 25,084.61 × 10,221.61
  4. Step 4: Simplify right side
    18,178.15x = 256,405,049.31
  5. Step 5: Solve for x
    x = 256,405,049.31/18,178.15
  6. Step 6: Final answer
    x = 14,105.12

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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.