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Finding the Fourth Proportional to 7,290.78, 10,937.76 and 2,673.78

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Solution

The fourth proportional to 7,290.78, 10,937.76 and 2,673.78 is: 4,011.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,290.78 : 10,937.76 = 2,673.78 : x
  2. Step 2: Convert to fraction form
    7,290.78/10,937.76 = 2,673.78/x
  3. Step 3: Cross multiply
    7,290.78x = 10,937.76 × 2,673.78
  4. Step 4: Simplify right side
    7,290.78x = 29,245,163.93
  5. Step 5: Solve for x
    x = 29,245,163.93/7,290.78
  6. Step 6: Final answer
    x = 4,011.25

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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.