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Finding the Fourth Proportional to 18,491.32, 27,732 and 8,620.96

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Solution

The fourth proportional to 18,491.32, 27,732 and 8,620.96 is: 12,929.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.32 : 27,732 = 8,620.96 : x
  2. Step 2: Convert to fraction form
    18,491.32/27,732 = 8,620.96/x
  3. Step 3: Cross multiply
    18,491.32x = 27,732 × 8,620.96
  4. Step 4: Simplify right side
    18,491.32x = 239,076,462.72
  5. Step 5: Solve for x
    x = 239,076,462.72/18,491.32
  6. Step 6: Final answer
    x = 12,929.12

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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.