Home / 2,171.30-3,255.70-1,911.82

Finding the Fourth Proportional to 2,171.30, 3,255.70 and 1,911.82

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Solution

The fourth proportional to 2,171.30, 3,255.70 and 1,911.82 is: 2,866.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.30 : 3,255.70 = 1,911.82 : x
  2. Step 2: Convert to fraction form
    2,171.30/3,255.70 = 1,911.82/x
  3. Step 3: Cross multiply
    2,171.30x = 3,255.70 × 1,911.82
  4. Step 4: Simplify right side
    2,171.30x = 6,224,312.37
  5. Step 5: Solve for x
    x = 6,224,312.37/2,171.30
  6. Step 6: Final answer
    x = 2,866.63

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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.