Home / 20,791.26-31,186.62-5,209.02

Finding the Fourth Proportional to 20,791.26, 31,186.62 and 5,209.02

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Solution

The fourth proportional to 20,791.26, 31,186.62 and 5,209.02 is: 7,813.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.26 : 31,186.62 = 5,209.02 : x
  2. Step 2: Convert to fraction form
    20,791.26/31,186.62 = 5,209.02/x
  3. Step 3: Cross multiply
    20,791.26x = 31,186.62 × 5,209.02
  4. Step 4: Simplify right side
    20,791.26x = 162,451,727.31
  5. Step 5: Solve for x
    x = 162,451,727.31/20,791.26
  6. Step 6: Final answer
    x = 7,813.46

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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.