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Finding the Fourth Proportional to 7,074.72, 9,763.38 and 3,888

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Solution

The fourth proportional to 7,074.72, 9,763.38 and 3,888 is: 5,365.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,074.72 : 9,763.38 = 3,888 : x
  2. Step 2: Convert to fraction form
    7,074.72/9,763.38 = 3,888/x
  3. Step 3: Cross multiply
    7,074.72x = 9,763.38 × 3,888
  4. Step 4: Simplify right side
    7,074.72x = 37,960,021.44
  5. Step 5: Solve for x
    x = 37,960,021.44/7,074.72
  6. Step 6: Final answer
    x = 5,365.59

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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.