Home / 5,105.72-7,658.58-1,408.34

Finding the Fourth Proportional to 5,105.72, 7,658.58 and 1,408.34

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Solution

The fourth proportional to 5,105.72, 7,658.58 and 1,408.34 is: 2,112.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.72 : 7,658.58 = 1,408.34 : x
  2. Step 2: Convert to fraction form
    5,105.72/7,658.58 = 1,408.34/x
  3. Step 3: Cross multiply
    5,105.72x = 7,658.58 × 1,408.34
  4. Step 4: Simplify right side
    5,105.72x = 10,785,884.56
  5. Step 5: Solve for x
    x = 10,785,884.56/5,105.72
  6. Step 6: Final answer
    x = 2,112.51

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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.