Home / 2,811.47-3,879.81-1,552.55

Finding the Fourth Proportional to 2,811.47, 3,879.81 and 1,552.55

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Solution

The fourth proportional to 2,811.47, 3,879.81 and 1,552.55 is: 2,142.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.47 : 3,879.81 = 1,552.55 : x
  2. Step 2: Convert to fraction form
    2,811.47/3,879.81 = 1,552.55/x
  3. Step 3: Cross multiply
    2,811.47x = 3,879.81 × 1,552.55
  4. Step 4: Simplify right side
    2,811.47x = 6,023,579.62
  5. Step 5: Solve for x
    x = 6,023,579.62/2,811.47
  6. Step 6: Final answer
    x = 2,142.51

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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.