Home / 13,661.36-20,469.39-4,771.91

Finding the Fourth Proportional to 13,661.36, 20,469.39 and 4,771.91

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Solution

The fourth proportional to 13,661.36, 20,469.39 and 4,771.91 is: 7,149.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.36 : 20,469.39 = 4,771.91 : x
  2. Step 2: Convert to fraction form
    13,661.36/20,469.39 = 4,771.91/x
  3. Step 3: Cross multiply
    13,661.36x = 20,469.39 × 4,771.91
  4. Step 4: Simplify right side
    13,661.36x = 97,678,062.98
  5. Step 5: Solve for x
    x = 97,678,062.98/13,661.36
  6. Step 6: Final answer
    x = 7,149.95

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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.