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Finding the Fourth Proportional to 6,392.21, 8,821.65 and 3,874.54

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Solution

The fourth proportional to 6,392.21, 8,821.65 and 3,874.54 is: 5,347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,392.21 : 8,821.65 = 3,874.54 : x
  2. Step 2: Convert to fraction form
    6,392.21/8,821.65 = 3,874.54/x
  3. Step 3: Cross multiply
    6,392.21x = 8,821.65 × 3,874.54
  4. Step 4: Simplify right side
    6,392.21x = 34,179,835.79
  5. Step 5: Solve for x
    x = 34,179,835.79/6,392.21
  6. Step 6: Final answer
    x = 5,347.11

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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.