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Finding the Fourth Proportional to 11,109.21, 15,304.65 and 7,745.91

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Solution

The fourth proportional to 11,109.21, 15,304.65 and 7,745.91 is: 10,671.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.21 : 15,304.65 = 7,745.91 : x
  2. Step 2: Convert to fraction form
    11,109.21/15,304.65 = 7,745.91/x
  3. Step 3: Cross multiply
    11,109.21x = 15,304.65 × 7,745.91
  4. Step 4: Simplify right side
    11,109.21x = 118,548,441.48
  5. Step 5: Solve for x
    x = 118,548,441.48/11,109.21
  6. Step 6: Final answer
    x = 10,671.19

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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.