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Finding the Fourth Proportional to 8,234.20, 12,349.86 and 2,390.20

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Solution

The fourth proportional to 8,234.20, 12,349.86 and 2,390.20 is: 3,584.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,234.20 : 12,349.86 = 2,390.20 : x
  2. Step 2: Convert to fraction form
    8,234.20/12,349.86 = 2,390.20/x
  3. Step 3: Cross multiply
    8,234.20x = 12,349.86 × 2,390.20
  4. Step 4: Simplify right side
    8,234.20x = 29,518,635.37
  5. Step 5: Solve for x
    x = 29,518,635.37/8,234.20
  6. Step 6: Final answer
    x = 3,584.88

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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.