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Finding the Fourth Proportional to 8,939.79, 13,399.97 and 3,739.59

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Solution

The fourth proportional to 8,939.79, 13,399.97 and 3,739.59 is: 5,605.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.79 : 13,399.97 = 3,739.59 : x
  2. Step 2: Convert to fraction form
    8,939.79/13,399.97 = 3,739.59/x
  3. Step 3: Cross multiply
    8,939.79x = 13,399.97 × 3,739.59
  4. Step 4: Simplify right side
    8,939.79x = 50,110,375.11
  5. Step 5: Solve for x
    x = 50,110,375.11/8,939.79
  6. Step 6: Final answer
    x = 5,605.32

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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.