Home / 20,887.42-31,340.31-7,736.98

Finding the Fourth Proportional to 20,887.42, 31,340.31 and 7,736.98

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Solution

The fourth proportional to 20,887.42, 31,340.31 and 7,736.98 is: 11,608.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.42 : 31,340.31 = 7,736.98 : x
  2. Step 2: Convert to fraction form
    20,887.42/31,340.31 = 7,736.98/x
  3. Step 3: Cross multiply
    20,887.42x = 31,340.31 × 7,736.98
  4. Step 4: Simplify right side
    20,887.42x = 242,479,351.66
  5. Step 5: Solve for x
    x = 242,479,351.66/20,887.42
  6. Step 6: Final answer
    x = 11,608.87

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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.