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Finding the Fourth Proportional to 18,620.24, 27,936.44 and 5,472.72

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Solution

The fourth proportional to 18,620.24, 27,936.44 and 5,472.72 is: 8,210.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.24 : 27,936.44 = 5,472.72 : x
  2. Step 2: Convert to fraction form
    18,620.24/27,936.44 = 5,472.72/x
  3. Step 3: Cross multiply
    18,620.24x = 27,936.44 × 5,472.72
  4. Step 4: Simplify right side
    18,620.24x = 152,888,313.92
  5. Step 5: Solve for x
    x = 152,888,313.92/18,620.24
  6. Step 6: Final answer
    x = 8,210.87

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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.