Home / 2,811.51-3,879.89-1,552.57

Finding the Fourth Proportional to 2,811.51, 3,879.89 and 1,552.57

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Solution

The fourth proportional to 2,811.51, 3,879.89 and 1,552.57 is: 2,142.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.51 : 3,879.89 = 1,552.57 : x
  2. Step 2: Convert to fraction form
    2,811.51/3,879.89 = 1,552.57/x
  3. Step 3: Cross multiply
    2,811.51x = 3,879.89 × 1,552.57
  4. Step 4: Simplify right side
    2,811.51x = 6,023,803.73
  5. Step 5: Solve for x
    x = 6,023,803.73/2,811.51
  6. Step 6: Final answer
    x = 2,142.55

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1.5x scale

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.