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Finding the Fourth Proportional to 8,138.63, 12,207.94 and 1,982.63

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Solution

The fourth proportional to 8,138.63, 12,207.94 and 1,982.63 is: 2,973.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.63 : 12,207.94 = 1,982.63 : x
  2. Step 2: Convert to fraction form
    8,138.63/12,207.94 = 1,982.63/x
  3. Step 3: Cross multiply
    8,138.63x = 12,207.94 × 1,982.63
  4. Step 4: Simplify right side
    8,138.63x = 24,203,828.08
  5. Step 5: Solve for x
    x = 24,203,828.08/8,138.63
  6. Step 6: Final answer
    x = 2,973.94

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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.