Home / 3,938.20-5,434.74-2,169.77

Finding the Fourth Proportional to 3,938.20, 5,434.74 and 2,169.77

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Solution

The fourth proportional to 3,938.20, 5,434.74 and 2,169.77 is: 2,994.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.20 : 5,434.74 = 2,169.77 : x
  2. Step 2: Convert to fraction form
    3,938.20/5,434.74 = 2,169.77/x
  3. Step 3: Cross multiply
    3,938.20x = 5,434.74 × 2,169.77
  4. Step 4: Simplify right side
    3,938.20x = 11,792,133.10
  5. Step 5: Solve for x
    x = 11,792,133.10/3,938.20
  6. Step 6: Final answer
    x = 2,994.29

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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.