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Finding the Fourth Proportional to 18,764.20, 28,138.20 and 9,400.60

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Solution

The fourth proportional to 18,764.20, 28,138.20 and 9,400.60 is: 14,096.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,764.20 : 28,138.20 = 9,400.60 : x
  2. Step 2: Convert to fraction form
    18,764.20/28,138.20 = 9,400.60/x
  3. Step 3: Cross multiply
    18,764.20x = 28,138.20 × 9,400.60
  4. Step 4: Simplify right side
    18,764.20x = 264,515,962.92
  5. Step 5: Solve for x
    x = 264,515,962.92/18,764.20
  6. Step 6: Final answer
    x = 14,096.84

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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.