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Finding the Fourth Proportional to 18,011.78, 27,017.09 and 8,151.06

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Solution

The fourth proportional to 18,011.78, 27,017.09 and 8,151.06 is: 12,226.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,011.78 : 27,017.09 = 8,151.06 : x
  2. Step 2: Convert to fraction form
    18,011.78/27,017.09 = 8,151.06/x
  3. Step 3: Cross multiply
    18,011.78x = 27,017.09 × 8,151.06
  4. Step 4: Simplify right side
    18,011.78x = 220,217,766.15
  5. Step 5: Solve for x
    x = 220,217,766.15/18,011.78
  6. Step 6: Final answer
    x = 12,226.32

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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.