Home / 20,745.30-31,105.38-8,267.22

Finding the Fourth Proportional to 20,745.30, 31,105.38 and 8,267.22

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Solution

The fourth proportional to 20,745.30, 31,105.38 and 8,267.22 is: 12,395.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.30 : 31,105.38 = 8,267.22 : x
  2. Step 2: Convert to fraction form
    20,745.30/31,105.38 = 8,267.22/x
  3. Step 3: Cross multiply
    20,745.30x = 31,105.38 × 8,267.22
  4. Step 4: Simplify right side
    20,745.30x = 257,155,019.64
  5. Step 5: Solve for x
    x = 257,155,019.64/20,745.30
  6. Step 6: Final answer
    x = 12,395.82

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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.