Home / 20,072.80-30,109.20-8,379.64

Finding the Fourth Proportional to 20,072.80, 30,109.20 and 8,379.64

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Solution

The fourth proportional to 20,072.80, 30,109.20 and 8,379.64 is: 12,569.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,072.80 : 30,109.20 = 8,379.64 : x
  2. Step 2: Convert to fraction form
    20,072.80/30,109.20 = 8,379.64/x
  3. Step 3: Cross multiply
    20,072.80x = 30,109.20 × 8,379.64
  4. Step 4: Simplify right side
    20,072.80x = 252,304,064.24
  5. Step 5: Solve for x
    x = 252,304,064.24/20,072.80
  6. Step 6: Final answer
    x = 12,569.45

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Similar ratio
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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.