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Finding the Fourth Proportional to 18,676, 28,015.62 and 4,825

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Solution

The fourth proportional to 18,676, 28,015.62 and 4,825 is: 7,237.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676 : 28,015.62 = 4,825 : x
  2. Step 2: Convert to fraction form
    18,676/28,015.62 = 4,825/x
  3. Step 3: Cross multiply
    18,676x = 28,015.62 × 4,825
  4. Step 4: Simplify right side
    18,676x = 135,175,366.50
  5. Step 5: Solve for x
    x = 135,175,366.50/18,676
  6. Step 6: Final answer
    x = 7,237.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.