Home / 3,786-5,234.40-3,622.80

Finding the Fourth Proportional to 3,786, 5,234.40 and 3,622.80

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Solution

The fourth proportional to 3,786, 5,234.40 and 3,622.80 is: 5,008.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786 : 5,234.40 = 3,622.80 : x
  2. Step 2: Convert to fraction form
    3,786/5,234.40 = 3,622.80/x
  3. Step 3: Cross multiply
    3,786x = 5,234.40 × 3,622.80
  4. Step 4: Simplify right side
    3,786x = 18,963,184.32
  5. Step 5: Solve for x
    x = 18,963,184.32/3,786
  6. Step 6: Final answer
    x = 5,008.77

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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.