Home / 4,989.72-7,474.98-2,791.80

Finding the Fourth Proportional to 4,989.72, 7,474.98 and 2,791.80

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Solution

The fourth proportional to 4,989.72, 7,474.98 and 2,791.80 is: 4,182.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.72 : 7,474.98 = 2,791.80 : x
  2. Step 2: Convert to fraction form
    4,989.72/7,474.98 = 2,791.80/x
  3. Step 3: Cross multiply
    4,989.72x = 7,474.98 × 2,791.80
  4. Step 4: Simplify right side
    4,989.72x = 20,868,649.16
  5. Step 5: Solve for x
    x = 20,868,649.16/4,989.72
  6. Step 6: Final answer
    x = 4,182.33

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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.