Home / 20,745.73-31,118.70-5,163.35

Finding the Fourth Proportional to 20,745.73, 31,118.70 and 5,163.35

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Solution

The fourth proportional to 20,745.73, 31,118.70 and 5,163.35 is: 7,745.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.73 : 31,118.70 = 5,163.35 : x
  2. Step 2: Convert to fraction form
    20,745.73/31,118.70 = 5,163.35/x
  3. Step 3: Cross multiply
    20,745.73x = 31,118.70 × 5,163.35
  4. Step 4: Simplify right side
    20,745.73x = 160,676,739.65
  5. Step 5: Solve for x
    x = 160,676,739.65/20,745.73
  6. Step 6: Final answer
    x = 7,745.05

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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.