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Finding the Fourth Proportional to 8,338.40, 12,511.20 and 4,234.40

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Solution

The fourth proportional to 8,338.40, 12,511.20 and 4,234.40 is: 6,353.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,338.40 : 12,511.20 = 4,234.40 : x
  2. Step 2: Convert to fraction form
    8,338.40/12,511.20 = 4,234.40/x
  3. Step 3: Cross multiply
    8,338.40x = 12,511.20 × 4,234.40
  4. Step 4: Simplify right side
    8,338.40x = 52,977,425.28
  5. Step 5: Solve for x
    x = 52,977,425.28/8,338.40
  6. Step 6: Final answer
    x = 6,353.43

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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.