Home / 20,745.21-31,117.83-5,162.84

Finding the Fourth Proportional to 20,745.21, 31,117.83 and 5,162.84

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Solution

The fourth proportional to 20,745.21, 31,117.83 and 5,162.84 is: 7,744.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.21 : 31,117.83 = 5,162.84 : x
  2. Step 2: Convert to fraction form
    20,745.21/31,117.83 = 5,162.84/x
  3. Step 3: Cross multiply
    20,745.21x = 31,117.83 × 5,162.84
  4. Step 4: Simplify right side
    20,745.21x = 160,656,221.85
  5. Step 5: Solve for x
    x = 160,656,221.85/20,745.21
  6. Step 6: Final answer
    x = 7,744.26

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1.5x scale

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.