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Finding the Fourth Proportional to 8,555.92, 12,816 and 6,880.99

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Solution

The fourth proportional to 8,555.92, 12,816 and 6,880.99 is: 10,307.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,555.92 : 12,816 = 6,880.99 : x
  2. Step 2: Convert to fraction form
    8,555.92/12,816 = 6,880.99/x
  3. Step 3: Cross multiply
    8,555.92x = 12,816 × 6,880.99
  4. Step 4: Simplify right side
    8,555.92x = 88,186,767.84
  5. Step 5: Solve for x
    x = 88,186,767.84/8,555.92
  6. Step 6: Final answer
    x = 10,307.11

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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.