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Finding the Fourth Proportional to 18,620.46, 27,940.32 and 12,384.81

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Solution

The fourth proportional to 18,620.46, 27,940.32 and 12,384.81 is: 18,583.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.46 : 27,940.32 = 12,384.81 : x
  2. Step 2: Convert to fraction form
    18,620.46/27,940.32 = 12,384.81/x
  3. Step 3: Cross multiply
    18,620.46x = 27,940.32 × 12,384.81
  4. Step 4: Simplify right side
    18,620.46x = 346,035,554.54
  5. Step 5: Solve for x
    x = 346,035,554.54/18,620.46
  6. Step 6: Final answer
    x = 18,583.62

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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.