Home / 20,742.26-31,113.52-5,159.90

Finding the Fourth Proportional to 20,742.26, 31,113.52 and 5,159.90

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Solution

The fourth proportional to 20,742.26, 31,113.52 and 5,159.90 is: 7,739.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.26 : 31,113.52 = 5,159.90 : x
  2. Step 2: Convert to fraction form
    20,742.26/31,113.52 = 5,159.90/x
  3. Step 3: Cross multiply
    20,742.26x = 31,113.52 × 5,159.90
  4. Step 4: Simplify right side
    20,742.26x = 160,542,651.85
  5. Step 5: Solve for x
    x = 160,542,651.85/20,742.26
  6. Step 6: Final answer
    x = 7,739.88

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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.