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Finding the Fourth Proportional to 20,471.13, 30,687.26 and 7,999.16

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Solution

The fourth proportional to 20,471.13, 30,687.26 and 7,999.16 is: 11,991.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.13 : 30,687.26 = 7,999.16 : x
  2. Step 2: Convert to fraction form
    20,471.13/30,687.26 = 7,999.16/x
  3. Step 3: Cross multiply
    20,471.13x = 30,687.26 × 7,999.16
  4. Step 4: Simplify right side
    20,471.13x = 245,472,109.27
  5. Step 5: Solve for x
    x = 245,472,109.27/20,471.13
  6. Step 6: Final answer
    x = 11,991.14

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.