Home / 5,105.22-7,045.85-3,115.35

Finding the Fourth Proportional to 5,105.22, 7,045.85 and 3,115.35

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Solution

The fourth proportional to 5,105.22, 7,045.85 and 3,115.35 is: 4,299.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.22 : 7,045.85 = 3,115.35 : x
  2. Step 2: Convert to fraction form
    5,105.22/7,045.85 = 3,115.35/x
  3. Step 3: Cross multiply
    5,105.22x = 7,045.85 × 3,115.35
  4. Step 4: Simplify right side
    5,105.22x = 21,950,288.80
  5. Step 5: Solve for x
    x = 21,950,288.80/5,105.22
  6. Step 6: Final answer
    x = 4,299.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.