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Finding the Fourth Proportional to 7,878.29, 10,872.26 and 4,341.72

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Solution

The fourth proportional to 7,878.29, 10,872.26 and 4,341.72 is: 5,991.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.29 : 10,872.26 = 4,341.72 : x
  2. Step 2: Convert to fraction form
    7,878.29/10,872.26 = 4,341.72/x
  3. Step 3: Cross multiply
    7,878.29x = 10,872.26 × 4,341.72
  4. Step 4: Simplify right side
    7,878.29x = 47,204,286.98
  5. Step 5: Solve for x
    x = 47,204,286.98/7,878.29
  6. Step 6: Final answer
    x = 5,991.70

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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.