Home / 20,912.09-31,367.73-5,329.76

Finding the Fourth Proportional to 20,912.09, 31,367.73 and 5,329.76

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Solution

The fourth proportional to 20,912.09, 31,367.73 and 5,329.76 is: 7,994.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.09 : 31,367.73 = 5,329.76 : x
  2. Step 2: Convert to fraction form
    20,912.09/31,367.73 = 5,329.76/x
  3. Step 3: Cross multiply
    20,912.09x = 31,367.73 × 5,329.76
  4. Step 4: Simplify right side
    20,912.09x = 167,182,472.64
  5. Step 5: Solve for x
    x = 167,182,472.64/20,912.09
  6. Step 6: Final answer
    x = 7,994.54

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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.