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Finding the Fourth Proportional to 8,878.87, 13,314.40 and 4,717.90

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Solution

The fourth proportional to 8,878.87, 13,314.40 and 4,717.90 is: 7,074.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.87 : 13,314.40 = 4,717.90 : x
  2. Step 2: Convert to fraction form
    8,878.87/13,314.40 = 4,717.90/x
  3. Step 3: Cross multiply
    8,878.87x = 13,314.40 × 4,717.90
  4. Step 4: Simplify right side
    8,878.87x = 62,816,007.76
  5. Step 5: Solve for x
    x = 62,816,007.76/8,878.87
  6. Step 6: Final answer
    x = 7,074.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.