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Finding the Fourth Proportional to 3,907.44, 5,392.07 and 2,138.71

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Solution

The fourth proportional to 3,907.44, 5,392.07 and 2,138.71 is: 2,951.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.44 : 5,392.07 = 2,138.71 : x
  2. Step 2: Convert to fraction form
    3,907.44/5,392.07 = 2,138.71/x
  3. Step 3: Cross multiply
    3,907.44x = 5,392.07 × 2,138.71
  4. Step 4: Simplify right side
    3,907.44x = 11,532,063.34
  5. Step 5: Solve for x
    x = 11,532,063.34/3,907.44
  6. Step 6: Final answer
    x = 2,951.31

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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.