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Finding the Fourth Proportional to 4,881.36, 6,734.72 and 2,991.96

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Solution

The fourth proportional to 4,881.36, 6,734.72 and 2,991.96 is: 4,127.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,881.36 : 6,734.72 = 2,991.96 : x
  2. Step 2: Convert to fraction form
    4,881.36/6,734.72 = 2,991.96/x
  3. Step 3: Cross multiply
    4,881.36x = 6,734.72 × 2,991.96
  4. Step 4: Simplify right side
    4,881.36x = 20,150,012.85
  5. Step 5: Solve for x
    x = 20,150,012.85/4,881.36
  6. Step 6: Final answer
    x = 4,127.95

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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.