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Finding the Fourth Proportional to 13,918.17, 20,879.14 and 4,057.37

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Solution

The fourth proportional to 13,918.17, 20,879.14 and 4,057.37 is: 6,086.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.17 : 20,879.14 = 4,057.37 : x
  2. Step 2: Convert to fraction form
    13,918.17/20,879.14 = 4,057.37/x
  3. Step 3: Cross multiply
    13,918.17x = 20,879.14 × 4,057.37
  4. Step 4: Simplify right side
    13,918.17x = 84,714,485.07
  5. Step 5: Solve for x
    x = 84,714,485.07/13,918.17
  6. Step 6: Final answer
    x = 6,086.61

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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.