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Finding the Fourth Proportional to 8,103.70, 12,148.80 and 3,427.30

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Solution

The fourth proportional to 8,103.70, 12,148.80 and 3,427.30 is: 5,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,103.70 : 12,148.80 = 3,427.30 : x
  2. Step 2: Convert to fraction form
    8,103.70/12,148.80 = 3,427.30/x
  3. Step 3: Cross multiply
    8,103.70x = 12,148.80 × 3,427.30
  4. Step 4: Simplify right side
    8,103.70x = 41,637,582.24
  5. Step 5: Solve for x
    x = 41,637,582.24/8,103.70
  6. Step 6: Final answer
    x = 5,138.10

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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.