Home / 21,093.06-31,639.66-7,941.90

Finding the Fourth Proportional to 21,093.06, 31,639.66 and 7,941.90

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Solution

The fourth proportional to 21,093.06, 31,639.66 and 7,941.90 is: 11,912.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,093.06 : 31,639.66 = 7,941.90 : x
  2. Step 2: Convert to fraction form
    21,093.06/31,639.66 = 7,941.90/x
  3. Step 3: Cross multiply
    21,093.06x = 31,639.66 × 7,941.90
  4. Step 4: Simplify right side
    21,093.06x = 251,279,015.75
  5. Step 5: Solve for x
    x = 251,279,015.75/21,093.06
  6. Step 6: Final answer
    x = 11,912.88

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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.