Home / 3,907.19-5,391.72-2,138.46

Finding the Fourth Proportional to 3,907.19, 5,391.72 and 2,138.46

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Solution

The fourth proportional to 3,907.19, 5,391.72 and 2,138.46 is: 2,950.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.19 : 5,391.72 = 2,138.46 : x
  2. Step 2: Convert to fraction form
    3,907.19/5,391.72 = 2,138.46/x
  3. Step 3: Cross multiply
    3,907.19x = 5,391.72 × 2,138.46
  4. Step 4: Simplify right side
    3,907.19x = 11,529,977.55
  5. Step 5: Solve for x
    x = 11,529,977.55/3,907.19
  6. Step 6: Final answer
    x = 2,950.96

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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.