Home / 13,739.20-20,620.49-5,425.10

Finding the Fourth Proportional to 13,739.20, 20,620.49 and 5,425.10

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Solution

The fourth proportional to 13,739.20, 20,620.49 and 5,425.10 is: 8,142.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.20 : 20,620.49 = 5,425.10 : x
  2. Step 2: Convert to fraction form
    13,739.20/20,620.49 = 5,425.10/x
  3. Step 3: Cross multiply
    13,739.20x = 20,620.49 × 5,425.10
  4. Step 4: Simplify right side
    13,739.20x = 111,868,220.30
  5. Step 5: Solve for x
    x = 111,868,220.30/13,739.20
  6. Step 6: Final answer
    x = 8,142.27

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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.