Home / 20,771.14-31,141.62-8,287.42

Finding the Fourth Proportional to 20,771.14, 31,141.62 and 8,287.42

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Solution

The fourth proportional to 20,771.14, 31,141.62 and 8,287.42 is: 12,425.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.14 : 31,141.62 = 8,287.42 : x
  2. Step 2: Convert to fraction form
    20,771.14/31,141.62 = 8,287.42/x
  3. Step 3: Cross multiply
    20,771.14x = 31,141.62 × 8,287.42
  4. Step 4: Simplify right side
    20,771.14x = 258,083,684.42
  5. Step 5: Solve for x
    x = 258,083,684.42/20,771.14
  6. Step 6: Final answer
    x = 12,425.11

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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.