Home / 3,939.12-5,435.87-2,261.50

Finding the Fourth Proportional to 3,939.12, 5,435.87 and 2,261.50

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Solution

The fourth proportional to 3,939.12, 5,435.87 and 2,261.50 is: 3,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.12 : 5,435.87 = 2,261.50 : x
  2. Step 2: Convert to fraction form
    3,939.12/5,435.87 = 2,261.50/x
  3. Step 3: Cross multiply
    3,939.12x = 5,435.87 × 2,261.50
  4. Step 4: Simplify right side
    3,939.12x = 12,293,195.11
  5. Step 5: Solve for x
    x = 12,293,195.11/3,939.12
  6. Step 6: Final answer
    x = 3,120.80

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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.