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Finding the Fourth Proportional to 11,121.67, 15,349.80 and 6,408.69

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Solution

The fourth proportional to 11,121.67, 15,349.80 and 6,408.69 is: 8,845.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.67 : 15,349.80 = 6,408.69 : x
  2. Step 2: Convert to fraction form
    11,121.67/15,349.80 = 6,408.69/x
  3. Step 3: Cross multiply
    11,121.67x = 15,349.80 × 6,408.69
  4. Step 4: Simplify right side
    11,121.67x = 98,372,109.76
  5. Step 5: Solve for x
    x = 98,372,109.76/11,121.67
  6. Step 6: Final answer
    x = 8,845.08

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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.