Home / 20,180.60-30,270.90-12,393.80

Finding the Fourth Proportional to 20,180.60, 30,270.90 and 12,393.80

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Solution

The fourth proportional to 20,180.60, 30,270.90 and 12,393.80 is: 18,590.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,180.60 : 30,270.90 = 12,393.80 : x
  2. Step 2: Convert to fraction form
    20,180.60/30,270.90 = 12,393.80/x
  3. Step 3: Cross multiply
    20,180.60x = 30,270.90 × 12,393.80
  4. Step 4: Simplify right side
    20,180.60x = 375,171,480.42
  5. Step 5: Solve for x
    x = 375,171,480.42/20,180.60
  6. Step 6: Final answer
    x = 18,590.70

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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.