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Finding the Fourth Proportional to 3,893.61, 5,831.84 and 3,218.85

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Solution

The fourth proportional to 3,893.61, 5,831.84 and 3,218.85 is: 4,821.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893.61 : 5,831.84 = 3,218.85 : x
  2. Step 2: Convert to fraction form
    3,893.61/5,831.84 = 3,218.85/x
  3. Step 3: Cross multiply
    3,893.61x = 5,831.84 × 3,218.85
  4. Step 4: Simplify right side
    3,893.61x = 18,771,802.09
  5. Step 5: Solve for x
    x = 18,771,802.09/3,893.61
  6. Step 6: Final answer
    x = 4,821.18

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1.5x scale

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.