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Finding the Fourth Proportional to 12,379.73, 18,541.00 and 7,438.48

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Solution

The fourth proportional to 12,379.73, 18,541.00 and 7,438.48 is: 11,140.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.73 : 18,541.00 = 7,438.48 : x
  2. Step 2: Convert to fraction form
    12,379.73/18,541.00 = 7,438.48/x
  3. Step 3: Cross multiply
    12,379.73x = 18,541.00 × 7,438.48
  4. Step 4: Simplify right side
    12,379.73x = 137,916,792.73
  5. Step 5: Solve for x
    x = 137,916,792.73/12,379.73
  6. Step 6: Final answer
    x = 11,140.53

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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.