Home / 3,905.01-5,387.31-2,855.25

Finding the Fourth Proportional to 3,905.01, 5,387.31 and 2,855.25

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Solution

The fourth proportional to 3,905.01, 5,387.31 and 2,855.25 is: 3,939.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.01 : 5,387.31 = 2,855.25 : x
  2. Step 2: Convert to fraction form
    3,905.01/5,387.31 = 2,855.25/x
  3. Step 3: Cross multiply
    3,905.01x = 5,387.31 × 2,855.25
  4. Step 4: Simplify right side
    3,905.01x = 15,382,116.88
  5. Step 5: Solve for x
    x = 15,382,116.88/3,905.01
  6. Step 6: Final answer
    x = 3,939.07

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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.