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Finding the Fourth Proportional to 4,881.72, 6,736.56 and 2,891.88

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Solution

The fourth proportional to 4,881.72, 6,736.56 and 2,891.88 is: 3,990.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,881.72 : 6,736.56 = 2,891.88 : x
  2. Step 2: Convert to fraction form
    4,881.72/6,736.56 = 2,891.88/x
  3. Step 3: Cross multiply
    4,881.72x = 6,736.56 × 2,891.88
  4. Step 4: Simplify right side
    4,881.72x = 19,481,323.13
  5. Step 5: Solve for x
    x = 19,481,323.13/4,881.72
  6. Step 6: Final answer
    x = 3,990.67

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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.