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Finding the Fourth Proportional to 12,398.56, 18,595.74 and 3,631.48

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Solution

The fourth proportional to 12,398.56, 18,595.74 and 3,631.48 is: 5,446.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,398.56 : 18,595.74 = 3,631.48 : x
  2. Step 2: Convert to fraction form
    12,398.56/18,595.74 = 3,631.48/x
  3. Step 3: Cross multiply
    12,398.56x = 18,595.74 × 3,631.48
  4. Step 4: Simplify right side
    12,398.56x = 67,530,057.90
  5. Step 5: Solve for x
    x = 67,530,057.90/12,398.56
  6. Step 6: Final answer
    x = 5,446.60

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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.