Home / 3,904.21-5,387.81-2,135.82

Finding the Fourth Proportional to 3,904.21, 5,387.81 and 2,135.82

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Solution

The fourth proportional to 3,904.21, 5,387.81 and 2,135.82 is: 2,947.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.21 : 5,387.81 = 2,135.82 : x
  2. Step 2: Convert to fraction form
    3,904.21/5,387.81 = 2,135.82/x
  3. Step 3: Cross multiply
    3,904.21x = 5,387.81 × 2,135.82
  4. Step 4: Simplify right side
    3,904.21x = 11,507,392.35
  5. Step 5: Solve for x
    x = 11,507,392.35/3,904.21
  6. Step 6: Final answer
    x = 2,947.43

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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.