Home / 2,122.69-3,187.63-1,383.56

Finding the Fourth Proportional to 2,122.69, 3,187.63 and 1,383.56

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Solution

The fourth proportional to 2,122.69, 3,187.63 and 1,383.56 is: 2,077.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.69 : 3,187.63 = 1,383.56 : x
  2. Step 2: Convert to fraction form
    2,122.69/3,187.63 = 1,383.56/x
  3. Step 3: Cross multiply
    2,122.69x = 3,187.63 × 1,383.56
  4. Step 4: Simplify right side
    2,122.69x = 4,410,277.36
  5. Step 5: Solve for x
    x = 4,410,277.36/2,122.69
  6. Step 6: Final answer
    x = 2,077.68

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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.