Home / 21,271.87-31,912.56-6,481.94

Finding the Fourth Proportional to 21,271.87, 31,912.56 and 6,481.94

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Solution

The fourth proportional to 21,271.87, 31,912.56 and 6,481.94 is: 9,724.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.87 : 31,912.56 = 6,481.94 : x
  2. Step 2: Convert to fraction form
    21,271.87/31,912.56 = 6,481.94/x
  3. Step 3: Cross multiply
    21,271.87x = 31,912.56 × 6,481.94
  4. Step 4: Simplify right side
    21,271.87x = 206,855,378.95
  5. Step 5: Solve for x
    x = 206,855,378.95/21,271.87
  6. Step 6: Final answer
    x = 9,724.36

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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.