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Finding the Fourth Proportional to 18,491.64, 27,738.60 and 6,813

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Solution

The fourth proportional to 18,491.64, 27,738.60 and 6,813 is: 10,219.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.64 : 27,738.60 = 6,813 : x
  2. Step 2: Convert to fraction form
    18,491.64/27,738.60 = 6,813/x
  3. Step 3: Cross multiply
    18,491.64x = 27,738.60 × 6,813
  4. Step 4: Simplify right side
    18,491.64x = 188,983,081.80
  5. Step 5: Solve for x
    x = 188,983,081.80/18,491.64
  6. Step 6: Final answer
    x = 10,219.92

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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.