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Finding the Fourth Proportional to 11,905.20, 16,428.02 and 6,599.90

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Solution

The fourth proportional to 11,905.20, 16,428.02 and 6,599.90 is: 9,107.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,905.20 : 16,428.02 = 6,599.90 : x
  2. Step 2: Convert to fraction form
    11,905.20/16,428.02 = 6,599.90/x
  3. Step 3: Cross multiply
    11,905.20x = 16,428.02 × 6,599.90
  4. Step 4: Simplify right side
    11,905.20x = 108,423,297.27
  5. Step 5: Solve for x
    x = 108,423,297.27/11,905.20
  6. Step 6: Final answer
    x = 9,107.22

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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.