Home / 13,791.38-20,679.51-6,391.76

Finding the Fourth Proportional to 13,791.38, 20,679.51 and 6,391.76

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Solution

The fourth proportional to 13,791.38, 20,679.51 and 6,391.76 is: 9,584.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.38 : 20,679.51 = 6,391.76 : x
  2. Step 2: Convert to fraction form
    13,791.38/20,679.51 = 6,391.76/x
  3. Step 3: Cross multiply
    13,791.38x = 20,679.51 × 6,391.76
  4. Step 4: Simplify right side
    13,791.38x = 132,178,516.54
  5. Step 5: Solve for x
    x = 132,178,516.54/13,791.38
  6. Step 6: Final answer
    x = 9,584.14

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1.5x scale

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.