Home / 3,965.38-5,470.50-2,787.22

Finding the Fourth Proportional to 3,965.38, 5,470.50 and 2,787.22

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Solution

The fourth proportional to 3,965.38, 5,470.50 and 2,787.22 is: 3,845.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,965.38 : 5,470.50 = 2,787.22 : x
  2. Step 2: Convert to fraction form
    3,965.38/5,470.50 = 2,787.22/x
  3. Step 3: Cross multiply
    3,965.38x = 5,470.50 × 2,787.22
  4. Step 4: Simplify right side
    3,965.38x = 15,247,487.01
  5. Step 5: Solve for x
    x = 15,247,487.01/3,965.38
  6. Step 6: Final answer
    x = 3,845.15

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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.