Home / 20,109.12-30,163.77-5,317.89

Finding the Fourth Proportional to 20,109.12, 30,163.77 and 5,317.89

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Solution

The fourth proportional to 20,109.12, 30,163.77 and 5,317.89 is: 7,976.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.12 : 30,163.77 = 5,317.89 : x
  2. Step 2: Convert to fraction form
    20,109.12/30,163.77 = 5,317.89/x
  3. Step 3: Cross multiply
    20,109.12x = 30,163.77 × 5,317.89
  4. Step 4: Simplify right side
    20,109.12x = 160,407,610.85
  5. Step 5: Solve for x
    x = 160,407,610.85/20,109.12
  6. Step 6: Final answer
    x = 7,976.86

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1.5x scale

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.