Home / 2,112.36-3,153.72-1,905

Finding the Fourth Proportional to 2,112.36, 3,153.72 and 1,905

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Solution

The fourth proportional to 2,112.36, 3,153.72 and 1,905 is: 2,844.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.36 : 3,153.72 = 1,905 : x
  2. Step 2: Convert to fraction form
    2,112.36/3,153.72 = 1,905/x
  3. Step 3: Cross multiply
    2,112.36x = 3,153.72 × 1,905
  4. Step 4: Simplify right side
    2,112.36x = 6,007,836.60
  5. Step 5: Solve for x
    x = 6,007,836.60/2,112.36
  6. Step 6: Final answer
    x = 2,844.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.