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Finding the Fourth Proportional to 18,118.72, 27,165.66 and 8,119.72

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Solution

The fourth proportional to 18,118.72, 27,165.66 and 8,119.72 is: 12,174.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,118.72 : 27,165.66 = 8,119.72 : x
  2. Step 2: Convert to fraction form
    18,118.72/27,165.66 = 8,119.72/x
  3. Step 3: Cross multiply
    18,118.72x = 27,165.66 × 8,119.72
  4. Step 4: Simplify right side
    18,118.72x = 220,577,552.82
  5. Step 5: Solve for x
    x = 220,577,552.82/18,118.72
  6. Step 6: Final answer
    x = 12,174.01

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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.