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Finding the Fourth Proportional to 18,661.65, 25,752.69 and 10,163.87

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Solution

The fourth proportional to 18,661.65, 25,752.69 and 10,163.87 is: 14,025.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.65 : 25,752.69 = 10,163.87 : x
  2. Step 2: Convert to fraction form
    18,661.65/25,752.69 = 10,163.87/x
  3. Step 3: Cross multiply
    18,661.65x = 25,752.69 × 10,163.87
  4. Step 4: Simplify right side
    18,661.65x = 261,746,864.55
  5. Step 5: Solve for x
    x = 261,746,864.55/18,661.65
  6. Step 6: Final answer
    x = 14,025.92

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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.