Home / 2,021.61-2,787.97-1,391.02

Finding the Fourth Proportional to 2,021.61, 2,787.97 and 1,391.02

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Solution

The fourth proportional to 2,021.61, 2,787.97 and 1,391.02 is: 1,918.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.61 : 2,787.97 = 1,391.02 : x
  2. Step 2: Convert to fraction form
    2,021.61/2,787.97 = 1,391.02/x
  3. Step 3: Cross multiply
    2,021.61x = 2,787.97 × 1,391.02
  4. Step 4: Simplify right side
    2,021.61x = 3,878,129.87
  5. Step 5: Solve for x
    x = 3,878,129.87/2,021.61
  6. Step 6: Final answer
    x = 1,918.34

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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.