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Finding the Fourth Proportional to 12,092.40, 18,138.72 and 7,958.64

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Solution

The fourth proportional to 12,092.40, 18,138.72 and 7,958.64 is: 11,938.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,092.40 : 18,138.72 = 7,958.64 : x
  2. Step 2: Convert to fraction form
    12,092.40/18,138.72 = 7,958.64/x
  3. Step 3: Cross multiply
    12,092.40x = 18,138.72 × 7,958.64
  4. Step 4: Simplify right side
    12,092.40x = 144,359,542.54
  5. Step 5: Solve for x
    x = 144,359,542.54/12,092.40
  6. Step 6: Final answer
    x = 11,938.04

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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.