Home / 3,939.70-5,438.73-2,687.26

Finding the Fourth Proportional to 3,939.70, 5,438.73 and 2,687.26

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Solution

The fourth proportional to 3,939.70, 5,438.73 and 2,687.26 is: 3,709.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.70 : 5,438.73 = 2,687.26 : x
  2. Step 2: Convert to fraction form
    3,939.70/5,438.73 = 2,687.26/x
  3. Step 3: Cross multiply
    3,939.70x = 5,438.73 × 2,687.26
  4. Step 4: Simplify right side
    3,939.70x = 14,615,281.58
  5. Step 5: Solve for x
    x = 14,615,281.58/3,939.70
  6. Step 6: Final answer
    x = 3,709.74

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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.