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Finding the Fourth Proportional to 8,291.70, 12,418.92 and 3,899.88

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Solution

The fourth proportional to 8,291.70, 12,418.92 and 3,899.88 is: 5,841.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,291.70 : 12,418.92 = 3,899.88 : x
  2. Step 2: Convert to fraction form
    8,291.70/12,418.92 = 3,899.88/x
  3. Step 3: Cross multiply
    8,291.70x = 12,418.92 × 3,899.88
  4. Step 4: Simplify right side
    8,291.70x = 48,432,297.73
  5. Step 5: Solve for x
    x = 48,432,297.73/8,291.70
  6. Step 6: Final answer
    x = 5,841.06

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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.