Home / 3,938.45-5,435.66-2,992.70

Finding the Fourth Proportional to 3,938.45, 5,435.66 and 2,992.70

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Solution

The fourth proportional to 3,938.45, 5,435.66 and 2,992.70 is: 4,130.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.45 : 5,435.66 = 2,992.70 : x
  2. Step 2: Convert to fraction form
    3,938.45/5,435.66 = 2,992.70/x
  3. Step 3: Cross multiply
    3,938.45x = 5,435.66 × 2,992.70
  4. Step 4: Simplify right side
    3,938.45x = 16,267,299.68
  5. Step 5: Solve for x
    x = 16,267,299.68/3,938.45
  6. Step 6: Final answer
    x = 4,130.38

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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.