Home / 3,121.78-4,683.64-1,873.77

Finding the Fourth Proportional to 3,121.78, 4,683.64 and 1,873.77

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Solution

The fourth proportional to 3,121.78, 4,683.64 and 1,873.77 is: 2,811.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.78 : 4,683.64 = 1,873.77 : x
  2. Step 2: Convert to fraction form
    3,121.78/4,683.64 = 1,873.77/x
  3. Step 3: Cross multiply
    3,121.78x = 4,683.64 × 1,873.77
  4. Step 4: Simplify right side
    3,121.78x = 8,776,064.12
  5. Step 5: Solve for x
    x = 8,776,064.12/3,121.78
  6. Step 6: Final answer
    x = 2,811.24

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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.