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Finding the Fourth Proportional to 18,425.35, 27,635.71 and 8,427.18

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Solution

The fourth proportional to 18,425.35, 27,635.71 and 8,427.18 is: 12,639.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425.35 : 27,635.71 = 8,427.18 : x
  2. Step 2: Convert to fraction form
    18,425.35/27,635.71 = 8,427.18/x
  3. Step 3: Cross multiply
    18,425.35x = 27,635.71 × 8,427.18
  4. Step 4: Simplify right side
    18,425.35x = 232,891,081.53
  5. Step 5: Solve for x
    x = 232,891,081.53/18,425.35
  6. Step 6: Final answer
    x = 12,639.71

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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.