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Finding the Fourth Proportional to 8,370.73, 12,540.79 and 3,920.23

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Solution

The fourth proportional to 8,370.73, 12,540.79 and 3,920.23 is: 5,873.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,370.73 : 12,540.79 = 3,920.23 : x
  2. Step 2: Convert to fraction form
    8,370.73/12,540.79 = 3,920.23/x
  3. Step 3: Cross multiply
    8,370.73x = 12,540.79 × 3,920.23
  4. Step 4: Simplify right side
    8,370.73x = 49,162,781.18
  5. Step 5: Solve for x
    x = 49,162,781.18/8,370.73
  6. Step 6: Final answer
    x = 5,873.18

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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.