Home / 3,942.37-5,438.34-3,390.15

Finding the Fourth Proportional to 3,942.37, 5,438.34 and 3,390.15

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Solution

The fourth proportional to 3,942.37, 5,438.34 and 3,390.15 is: 4,676.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.37 : 5,438.34 = 3,390.15 : x
  2. Step 2: Convert to fraction form
    3,942.37/5,438.34 = 3,390.15/x
  3. Step 3: Cross multiply
    3,942.37x = 5,438.34 × 3,390.15
  4. Step 4: Simplify right side
    3,942.37x = 18,436,808.74
  5. Step 5: Solve for x
    x = 18,436,808.74/3,942.37
  6. Step 6: Final answer
    x = 4,676.58

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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.