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Finding the Fourth Proportional to 18,640.06, 27,949.51 and 12,724.12

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Solution

The fourth proportional to 18,640.06, 27,949.51 and 12,724.12 is: 19,078.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.06 : 27,949.51 = 12,724.12 : x
  2. Step 2: Convert to fraction form
    18,640.06/27,949.51 = 12,724.12/x
  3. Step 3: Cross multiply
    18,640.06x = 27,949.51 × 12,724.12
  4. Step 4: Simplify right side
    18,640.06x = 355,632,715.81
  5. Step 5: Solve for x
    x = 355,632,715.81/18,640.06
  6. Step 6: Final answer
    x = 19,078.94

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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.