Home / 12,540.11-18,790.73-5,138.33

Finding the Fourth Proportional to 12,540.11, 18,790.73 and 5,138.33

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Solution

The fourth proportional to 12,540.11, 18,790.73 and 5,138.33 is: 7,699.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.11 : 18,790.73 = 5,138.33 : x
  2. Step 2: Convert to fraction form
    12,540.11/18,790.73 = 5,138.33/x
  3. Step 3: Cross multiply
    12,540.11x = 18,790.73 × 5,138.33
  4. Step 4: Simplify right side
    12,540.11x = 96,552,945.99
  5. Step 5: Solve for x
    x = 96,552,945.99/12,540.11
  6. Step 6: Final answer
    x = 7,699.53

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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.