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Finding the Fourth Proportional to 7,095.78, 9,791.43 and 4,112.55

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Solution

The fourth proportional to 7,095.78, 9,791.43 and 4,112.55 is: 5,674.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,095.78 : 9,791.43 = 4,112.55 : x
  2. Step 2: Convert to fraction form
    7,095.78/9,791.43 = 4,112.55/x
  3. Step 3: Cross multiply
    7,095.78x = 9,791.43 × 4,112.55
  4. Step 4: Simplify right side
    7,095.78x = 40,267,745.45
  5. Step 5: Solve for x
    x = 40,267,745.45/7,095.78
  6. Step 6: Final answer
    x = 5,674.89

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1.5x scale

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.