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Finding the Fourth Proportional to 12,108.96, 18,155.88 and 6,907.68

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Solution

The fourth proportional to 12,108.96, 18,155.88 and 6,907.68 is: 10,357.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.96 : 18,155.88 = 6,907.68 : x
  2. Step 2: Convert to fraction form
    12,108.96/18,155.88 = 6,907.68/x
  3. Step 3: Cross multiply
    12,108.96x = 18,155.88 × 6,907.68
  4. Step 4: Simplify right side
    12,108.96x = 125,415,009.16
  5. Step 5: Solve for x
    x = 125,415,009.16/12,108.96
  6. Step 6: Final answer
    x = 10,357.21

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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.