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Finding the Fourth Proportional to 5,645.80, 7,791.18 and 3,161.80

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Solution

The fourth proportional to 5,645.80, 7,791.18 and 3,161.80 is: 4,363.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,645.80 : 7,791.18 = 3,161.80 : x
  2. Step 2: Convert to fraction form
    5,645.80/7,791.18 = 3,161.80/x
  3. Step 3: Cross multiply
    5,645.80x = 7,791.18 × 3,161.80
  4. Step 4: Simplify right side
    5,645.80x = 24,634,152.92
  5. Step 5: Solve for x
    x = 24,634,152.92/5,645.80
  6. Step 6: Final answer
    x = 4,363.27

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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.