Home / 21,104.93-31,664.62-7,961.06

Finding the Fourth Proportional to 21,104.93, 31,664.62 and 7,961.06

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Solution

The fourth proportional to 21,104.93, 31,664.62 and 7,961.06 is: 11,944.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.93 : 31,664.62 = 7,961.06 : x
  2. Step 2: Convert to fraction form
    21,104.93/31,664.62 = 7,961.06/x
  3. Step 3: Cross multiply
    21,104.93x = 31,664.62 × 7,961.06
  4. Step 4: Simplify right side
    21,104.93x = 252,083,939.70
  5. Step 5: Solve for x
    x = 252,083,939.70/21,104.93
  6. Step 6: Final answer
    x = 11,944.32

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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.