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Finding the Fourth Proportional to 10,879.18, 15,015.99 and 6,685

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Solution

The fourth proportional to 10,879.18, 15,015.99 and 6,685 is: 9,226.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.18 : 15,015.99 = 6,685 : x
  2. Step 2: Convert to fraction form
    10,879.18/15,015.99 = 6,685/x
  3. Step 3: Cross multiply
    10,879.18x = 15,015.99 × 6,685
  4. Step 4: Simplify right side
    10,879.18x = 100,381,893.15
  5. Step 5: Solve for x
    x = 100,381,893.15/10,879.18
  6. Step 6: Final answer
    x = 9,226.97

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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.