Home / 3,787.60-5,686.70-1,939.99

Finding the Fourth Proportional to 3,787.60, 5,686.70 and 1,939.99

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Solution

The fourth proportional to 3,787.60, 5,686.70 and 1,939.99 is: 2,912.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,787.60 : 5,686.70 = 1,939.99 : x
  2. Step 2: Convert to fraction form
    3,787.60/5,686.70 = 1,939.99/x
  3. Step 3: Cross multiply
    3,787.60x = 5,686.70 × 1,939.99
  4. Step 4: Simplify right side
    3,787.60x = 11,032,141.13
  5. Step 5: Solve for x
    x = 11,032,141.13/3,787.60
  6. Step 6: Final answer
    x = 2,912.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.