Home / 20,739.44-31,109.04-5,156.96

Finding the Fourth Proportional to 20,739.44, 31,109.04 and 5,156.96

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Solution

The fourth proportional to 20,739.44, 31,109.04 and 5,156.96 is: 7,735.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.44 : 31,109.04 = 5,156.96 : x
  2. Step 2: Convert to fraction form
    20,739.44/31,109.04 = 5,156.96/x
  3. Step 3: Cross multiply
    20,739.44x = 31,109.04 × 5,156.96
  4. Step 4: Simplify right side
    20,739.44x = 160,428,074.92
  5. Step 5: Solve for x
    x = 160,428,074.92/20,739.44
  6. Step 6: Final answer
    x = 7,735.41

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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.