Home / 3,153.82-4,728.32-1,921

Finding the Fourth Proportional to 3,153.82, 4,728.32 and 1,921

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Solution

The fourth proportional to 3,153.82, 4,728.32 and 1,921 is: 2,880.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,153.82 : 4,728.32 = 1,921 : x
  2. Step 2: Convert to fraction form
    3,153.82/4,728.32 = 1,921/x
  3. Step 3: Cross multiply
    3,153.82x = 4,728.32 × 1,921
  4. Step 4: Simplify right side
    3,153.82x = 9,083,102.72
  5. Step 5: Solve for x
    x = 9,083,102.72/3,153.82
  6. Step 6: Final answer
    x = 2,880.03

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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.