Home / 20,188.20-30,282.30-12,768.60

Finding the Fourth Proportional to 20,188.20, 30,282.30 and 12,768.60

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Solution

The fourth proportional to 20,188.20, 30,282.30 and 12,768.60 is: 19,152.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,188.20 : 30,282.30 = 12,768.60 : x
  2. Step 2: Convert to fraction form
    20,188.20/30,282.30 = 12,768.60/x
  3. Step 3: Cross multiply
    20,188.20x = 30,282.30 × 12,768.60
  4. Step 4: Simplify right side
    20,188.20x = 386,662,575.78
  5. Step 5: Solve for x
    x = 386,662,575.78/20,188.20
  6. Step 6: Final answer
    x = 19,152.90

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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.