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Finding the Fourth Proportional to 7,999.01, 11,997.70 and 2,156.21

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Solution

The fourth proportional to 7,999.01, 11,997.70 and 2,156.21 is: 3,234.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.01 : 11,997.70 = 2,156.21 : x
  2. Step 2: Convert to fraction form
    7,999.01/11,997.70 = 2,156.21/x
  3. Step 3: Cross multiply
    7,999.01x = 11,997.70 × 2,156.21
  4. Step 4: Simplify right side
    7,999.01x = 25,869,489.95
  5. Step 5: Solve for x
    x = 25,869,489.95/7,999.01
  6. Step 6: Final answer
    x = 3,234.09

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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.