Home / 11,921.18-17,879.75-3,156.98

Finding the Fourth Proportional to 11,921.18, 17,879.75 and 3,156.98

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Solution

The fourth proportional to 11,921.18, 17,879.75 and 3,156.98 is: 4,734.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.18 : 17,879.75 = 3,156.98 : x
  2. Step 2: Convert to fraction form
    11,921.18/17,879.75 = 3,156.98/x
  3. Step 3: Cross multiply
    11,921.18x = 17,879.75 × 3,156.98
  4. Step 4: Simplify right side
    11,921.18x = 56,446,042.07
  5. Step 5: Solve for x
    x = 56,446,042.07/11,921.18
  6. Step 6: Final answer
    x = 4,734.94

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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.