Home / 3,933.78-5,422.32-2,986.49

Finding the Fourth Proportional to 3,933.78, 5,422.32 and 2,986.49

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Solution

The fourth proportional to 3,933.78, 5,422.32 and 2,986.49 is: 4,116.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,933.78 : 5,422.32 = 2,986.49 : x
  2. Step 2: Convert to fraction form
    3,933.78/5,422.32 = 2,986.49/x
  3. Step 3: Cross multiply
    3,933.78x = 5,422.32 × 2,986.49
  4. Step 4: Simplify right side
    3,933.78x = 16,193,677.35
  5. Step 5: Solve for x
    x = 16,193,677.35/3,933.78
  6. Step 6: Final answer
    x = 4,116.57

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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.