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Finding the Fourth Proportional to 18,491.31, 27,729.68 and 7,962.12

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Solution

The fourth proportional to 18,491.31, 27,729.68 and 7,962.12 is: 11,940.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.31 : 27,729.68 = 7,962.12 : x
  2. Step 2: Convert to fraction form
    18,491.31/27,729.68 = 7,962.12/x
  3. Step 3: Cross multiply
    18,491.31x = 27,729.68 × 7,962.12
  4. Step 4: Simplify right side
    18,491.31x = 220,786,999.91
  5. Step 5: Solve for x
    x = 220,786,999.91/18,491.31
  6. Step 6: Final answer
    x = 11,940.04

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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.