Home / 20,852.74-31,278.86-8,372.54

Finding the Fourth Proportional to 20,852.74, 31,278.86 and 8,372.54

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Solution

The fourth proportional to 20,852.74, 31,278.86 and 8,372.54 is: 12,558.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.74 : 31,278.86 = 8,372.54 : x
  2. Step 2: Convert to fraction form
    20,852.74/31,278.86 = 8,372.54/x
  3. Step 3: Cross multiply
    20,852.74x = 31,278.86 × 8,372.54
  4. Step 4: Simplify right side
    20,852.74x = 261,883,545.74
  5. Step 5: Solve for x
    x = 261,883,545.74/20,852.74
  6. Step 6: Final answer
    x = 12,558.71

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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.