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Finding the Fourth Proportional to 18,138.24, 25,022.52 and 12,163.68

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Solution

The fourth proportional to 18,138.24, 25,022.52 and 12,163.68 is: 16,780.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.24 : 25,022.52 = 12,163.68 : x
  2. Step 2: Convert to fraction form
    18,138.24/25,022.52 = 12,163.68/x
  3. Step 3: Cross multiply
    18,138.24x = 25,022.52 × 12,163.68
  4. Step 4: Simplify right side
    18,138.24x = 304,365,926.07
  5. Step 5: Solve for x
    x = 304,365,926.07/18,138.24
  6. Step 6: Final answer
    x = 16,780.35

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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.