Home / 20,912.00-31,372.93-6,872.06

Finding the Fourth Proportional to 20,912.00, 31,372.93 and 6,872.06

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Solution

The fourth proportional to 20,912.00, 31,372.93 and 6,872.06 is: 10,309.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.00 : 31,372.93 = 6,872.06 : x
  2. Step 2: Convert to fraction form
    20,912.00/31,372.93 = 6,872.06/x
  3. Step 3: Cross multiply
    20,912.00x = 31,372.93 × 6,872.06
  4. Step 4: Simplify right side
    20,912.00x = 215,596,744.36
  5. Step 5: Solve for x
    x = 215,596,744.36/20,912.00
  6. Step 6: Final answer
    x = 10,309.72

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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.