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Finding the Fourth Proportional to 20,644.40, 28,461.06 and 14,183.84

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Solution

The fourth proportional to 20,644.40, 28,461.06 and 14,183.84 is: 19,554.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.40 : 28,461.06 = 14,183.84 : x
  2. Step 2: Convert to fraction form
    20,644.40/28,461.06 = 14,183.84/x
  3. Step 3: Cross multiply
    20,644.40x = 28,461.06 × 14,183.84
  4. Step 4: Simplify right side
    20,644.40x = 403,687,121.27
  5. Step 5: Solve for x
    x = 403,687,121.27/20,644.40
  6. Step 6: Final answer
    x = 19,554.32

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.