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Finding the Fourth Proportional to 18,138.56, 27,207.84 and 4,992.32

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Solution

The fourth proportional to 18,138.56, 27,207.84 and 4,992.32 is: 7,488.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.56 : 27,207.84 = 4,992.32 : x
  2. Step 2: Convert to fraction form
    18,138.56/27,207.84 = 4,992.32/x
  3. Step 3: Cross multiply
    18,138.56x = 27,207.84 × 4,992.32
  4. Step 4: Simplify right side
    18,138.56x = 135,830,243.79
  5. Step 5: Solve for x
    x = 135,830,243.79/18,138.56
  6. Step 6: Final answer
    x = 7,488.48

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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.