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Finding the Fourth Proportional to 19,305.56, 28,962.59 and 10,989.50

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Solution

The fourth proportional to 19,305.56, 28,962.59 and 10,989.50 is: 16,486.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,305.56 : 28,962.59 = 10,989.50 : x
  2. Step 2: Convert to fraction form
    19,305.56/28,962.59 = 10,989.50/x
  3. Step 3: Cross multiply
    19,305.56x = 28,962.59 × 10,989.50
  4. Step 4: Simplify right side
    19,305.56x = 318,284,183.04
  5. Step 5: Solve for x
    x = 318,284,183.04/19,305.56
  6. Step 6: Final answer
    x = 16,486.66

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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.