Home / 3,712.78-5,124.08-2,221.50

Finding the Fourth Proportional to 3,712.78, 5,124.08 and 2,221.50

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Solution

The fourth proportional to 3,712.78, 5,124.08 and 2,221.50 is: 3,065.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.78 : 5,124.08 = 2,221.50 : x
  2. Step 2: Convert to fraction form
    3,712.78/5,124.08 = 2,221.50/x
  3. Step 3: Cross multiply
    3,712.78x = 5,124.08 × 2,221.50
  4. Step 4: Simplify right side
    3,712.78x = 11,383,143.72
  5. Step 5: Solve for x
    x = 11,383,143.72/3,712.78
  6. Step 6: Final answer
    x = 3,065.94

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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.