Home / 3,907.75-5,392.83-2,139.36

Finding the Fourth Proportional to 3,907.75, 5,392.83 and 2,139.36

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Solution

The fourth proportional to 3,907.75, 5,392.83 and 2,139.36 is: 2,952.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.75 : 5,392.83 = 2,139.36 : x
  2. Step 2: Convert to fraction form
    3,907.75/5,392.83 = 2,139.36/x
  3. Step 3: Cross multiply
    3,907.75x = 5,392.83 × 2,139.36
  4. Step 4: Simplify right side
    3,907.75x = 11,537,204.79
  5. Step 5: Solve for x
    x = 11,537,204.79/3,907.75
  6. Step 6: Final answer
    x = 2,952.39

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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.