Home / 13,938.81-20,908.22-5,171.37

Finding the Fourth Proportional to 13,938.81, 20,908.22 and 5,171.37

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Solution

The fourth proportional to 13,938.81, 20,908.22 and 5,171.37 is: 7,757.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.81 : 20,908.22 = 5,171.37 : x
  2. Step 2: Convert to fraction form
    13,938.81/20,908.22 = 5,171.37/x
  3. Step 3: Cross multiply
    13,938.81x = 20,908.22 × 5,171.37
  4. Step 4: Simplify right side
    13,938.81x = 108,124,115.80
  5. Step 5: Solve for x
    x = 108,124,115.80/13,938.81
  6. Step 6: Final answer
    x = 7,757.06

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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.