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Finding the Fourth Proportional to 18,754.56, 28,115.12 and 12,093.44

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Solution

The fourth proportional to 18,754.56, 28,115.12 and 12,093.44 is: 18,129.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.56 : 28,115.12 = 12,093.44 : x
  2. Step 2: Convert to fraction form
    18,754.56/28,115.12 = 12,093.44/x
  3. Step 3: Cross multiply
    18,754.56x = 28,115.12 × 12,093.44
  4. Step 4: Simplify right side
    18,754.56x = 340,008,516.81
  5. Step 5: Solve for x
    x = 340,008,516.81/18,754.56
  6. Step 6: Final answer
    x = 18,129.38

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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.