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Finding the Fourth Proportional to 18,954.21, 26,162.02 and 10,999

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Solution

The fourth proportional to 18,954.21, 26,162.02 and 10,999 is: 15,181.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.21 : 26,162.02 = 10,999 : x
  2. Step 2: Convert to fraction form
    18,954.21/26,162.02 = 10,999/x
  3. Step 3: Cross multiply
    18,954.21x = 26,162.02 × 10,999
  4. Step 4: Simplify right side
    18,954.21x = 287,756,057.98
  5. Step 5: Solve for x
    x = 287,756,057.98/18,954.21
  6. Step 6: Final answer
    x = 15,181.64

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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.