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Finding the Fourth Proportional to 18,619.64, 25,694.74 and 10,235.96

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Solution

The fourth proportional to 18,619.64, 25,694.74 and 10,235.96 is: 14,125.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.64 : 25,694.74 = 10,235.96 : x
  2. Step 2: Convert to fraction form
    18,619.64/25,694.74 = 10,235.96/x
  3. Step 3: Cross multiply
    18,619.64x = 25,694.74 × 10,235.96
  4. Step 4: Simplify right side
    18,619.64x = 263,010,330.85
  5. Step 5: Solve for x
    x = 263,010,330.85/18,619.64
  6. Step 6: Final answer
    x = 14,125.43

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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.