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Finding the Fourth Proportional to 8,339.55, 12,509.33 and 3,408.09

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Solution

The fourth proportional to 8,339.55, 12,509.33 and 3,408.09 is: 5,112.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,339.55 : 12,509.33 = 3,408.09 : x
  2. Step 2: Convert to fraction form
    8,339.55/12,509.33 = 3,408.09/x
  3. Step 3: Cross multiply
    8,339.55x = 12,509.33 × 3,408.09
  4. Step 4: Simplify right side
    8,339.55x = 42,632,905.44
  5. Step 5: Solve for x
    x = 42,632,905.44/8,339.55
  6. Step 6: Final answer
    x = 5,112.14

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Similar ratio
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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.