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Finding the Fourth Proportional to 18,428.56, 27,652.74 and 8,039.68

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Solution

The fourth proportional to 18,428.56, 27,652.74 and 8,039.68 is: 12,063.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.56 : 27,652.74 = 8,039.68 : x
  2. Step 2: Convert to fraction form
    18,428.56/27,652.74 = 8,039.68/x
  3. Step 3: Cross multiply
    18,428.56x = 27,652.74 × 8,039.68
  4. Step 4: Simplify right side
    18,428.56x = 222,319,180.72
  5. Step 5: Solve for x
    x = 222,319,180.72/18,428.56
  6. Step 6: Final answer
    x = 12,063.84

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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.