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Finding the Fourth Proportional to 18,141.05, 25,020.14 and 12,161.43

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Solution

The fourth proportional to 18,141.05, 25,020.14 and 12,161.43 is: 16,773.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,141.05 : 25,020.14 = 12,161.43 : x
  2. Step 2: Convert to fraction form
    18,141.05/25,020.14 = 12,161.43/x
  3. Step 3: Cross multiply
    18,141.05x = 25,020.14 × 12,161.43
  4. Step 4: Simplify right side
    18,141.05x = 304,280,620.39
  5. Step 5: Solve for x
    x = 304,280,620.39/18,141.05
  6. Step 6: Final answer
    x = 16,773.05

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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.