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Finding the Fourth Proportional to 8,571.22, 12,859.62 and 3,890.68

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Solution

The fourth proportional to 8,571.22, 12,859.62 and 3,890.68 is: 5,837.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.22 : 12,859.62 = 3,890.68 : x
  2. Step 2: Convert to fraction form
    8,571.22/12,859.62 = 3,890.68/x
  3. Step 3: Cross multiply
    8,571.22x = 12,859.62 × 3,890.68
  4. Step 4: Simplify right side
    8,571.22x = 50,032,666.34
  5. Step 5: Solve for x
    x = 50,032,666.34/8,571.22
  6. Step 6: Final answer
    x = 5,837.29

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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.