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Finding the Fourth Proportional to 8,682.21, 11,978.82 and 4,904.91

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Solution

The fourth proportional to 8,682.21, 11,978.82 and 4,904.91 is: 6,767.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,682.21 : 11,978.82 = 4,904.91 : x
  2. Step 2: Convert to fraction form
    8,682.21/11,978.82 = 4,904.91/x
  3. Step 3: Cross multiply
    8,682.21x = 11,978.82 × 4,904.91
  4. Step 4: Simplify right side
    8,682.21x = 58,755,034.01
  5. Step 5: Solve for x
    x = 58,755,034.01/8,682.21
  6. Step 6: Final answer
    x = 6,767.29

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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.