Home / 3,907.08-5,391.80-2,138.70

Finding the Fourth Proportional to 3,907.08, 5,391.80 and 2,138.70

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Solution

The fourth proportional to 3,907.08, 5,391.80 and 2,138.70 is: 2,951.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.08 : 5,391.80 = 2,138.70 : x
  2. Step 2: Convert to fraction form
    3,907.08/5,391.80 = 2,138.70/x
  3. Step 3: Cross multiply
    3,907.08x = 5,391.80 × 2,138.70
  4. Step 4: Simplify right side
    3,907.08x = 11,531,442.66
  5. Step 5: Solve for x
    x = 11,531,442.66/3,907.08
  6. Step 6: Final answer
    x = 2,951.42

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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.