Home / 3,965.60-5,470.70-2,787.36

Finding the Fourth Proportional to 3,965.60, 5,470.70 and 2,787.36

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Solution

The fourth proportional to 3,965.60, 5,470.70 and 2,787.36 is: 3,845.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,965.60 : 5,470.70 = 2,787.36 : x
  2. Step 2: Convert to fraction form
    3,965.60/5,470.70 = 2,787.36/x
  3. Step 3: Cross multiply
    3,965.60x = 5,470.70 × 2,787.36
  4. Step 4: Simplify right side
    3,965.60x = 15,248,810.35
  5. Step 5: Solve for x
    x = 15,248,810.35/3,965.60
  6. Step 6: Final answer
    x = 3,845.27

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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.