Home / 20,745.61-31,118.42-5,163.23

Finding the Fourth Proportional to 20,745.61, 31,118.42 and 5,163.23

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Solution

The fourth proportional to 20,745.61, 31,118.42 and 5,163.23 is: 7,744.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.61 : 31,118.42 = 5,163.23 : x
  2. Step 2: Convert to fraction form
    20,745.61/31,118.42 = 5,163.23/x
  3. Step 3: Cross multiply
    20,745.61x = 31,118.42 × 5,163.23
  4. Step 4: Simplify right side
    20,745.61x = 160,671,559.70
  5. Step 5: Solve for x
    x = 160,671,559.70/20,745.61
  6. Step 6: Final answer
    x = 7,744.85

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Double scale
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Similar ratio
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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.