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Finding the Fourth Proportional to 21,236.98, 31,869.83 and 8,089.01

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Solution

The fourth proportional to 21,236.98, 31,869.83 and 8,089.01 is: 12,138.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,236.98 : 31,869.83 = 8,089.01 : x
  2. Step 2: Convert to fraction form
    21,236.98/31,869.83 = 8,089.01/x
  3. Step 3: Cross multiply
    21,236.98x = 31,869.83 × 8,089.01
  4. Step 4: Simplify right side
    21,236.98x = 257,795,323.62
  5. Step 5: Solve for x
    x = 257,795,323.62/21,236.98
  6. Step 6: Final answer
    x = 12,138.98

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.