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Finding the Fourth Proportional to 18,662.60, 28,000.30 and 8,281.80

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Solution

The fourth proportional to 18,662.60, 28,000.30 and 8,281.80 is: 12,425.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.60 : 28,000.30 = 8,281.80 : x
  2. Step 2: Convert to fraction form
    18,662.60/28,000.30 = 8,281.80/x
  3. Step 3: Cross multiply
    18,662.60x = 28,000.30 × 8,281.80
  4. Step 4: Simplify right side
    18,662.60x = 231,892,884.54
  5. Step 5: Solve for x
    x = 231,892,884.54/18,662.60
  6. Step 6: Final answer
    x = 12,425.54

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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.