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Finding the Fourth Proportional to 18,015.10, 27,009.85 and 8,159.10

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Solution

The fourth proportional to 18,015.10, 27,009.85 and 8,159.10 is: 12,232.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,015.10 : 27,009.85 = 8,159.10 : x
  2. Step 2: Convert to fraction form
    18,015.10/27,009.85 = 8,159.10/x
  3. Step 3: Cross multiply
    18,015.10x = 27,009.85 × 8,159.10
  4. Step 4: Simplify right side
    18,015.10x = 220,376,067.14
  5. Step 5: Solve for x
    x = 220,376,067.14/18,015.10
  6. Step 6: Final answer
    x = 12,232.85

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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.