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Finding the Fourth Proportional to 11,917.98, 17,879.30 and 3,598.68

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Solution

The fourth proportional to 11,917.98, 17,879.30 and 3,598.68 is: 5,398.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,917.98 : 17,879.30 = 3,598.68 : x
  2. Step 2: Convert to fraction form
    11,917.98/17,879.30 = 3,598.68/x
  3. Step 3: Cross multiply
    11,917.98x = 17,879.30 × 3,598.68
  4. Step 4: Simplify right side
    11,917.98x = 64,341,879.32
  5. Step 5: Solve for x
    x = 64,341,879.32/11,917.98
  6. Step 6: Final answer
    x = 5,398.72

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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.