Home / 20,131.12-30,192.90-6,980.80

Finding the Fourth Proportional to 20,131.12, 30,192.90 and 6,980.80

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Solution

The fourth proportional to 20,131.12, 30,192.90 and 6,980.80 is: 10,469.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.12 : 30,192.90 = 6,980.80 : x
  2. Step 2: Convert to fraction form
    20,131.12/30,192.90 = 6,980.80/x
  3. Step 3: Cross multiply
    20,131.12x = 30,192.90 × 6,980.80
  4. Step 4: Simplify right side
    20,131.12x = 210,770,596.32
  5. Step 5: Solve for x
    x = 210,770,596.32/20,131.12
  6. Step 6: Final answer
    x = 10,469.89

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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.