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Finding the Fourth Proportional to 7,811.02, 11,711.06 and 2,880.02

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Solution

The fourth proportional to 7,811.02, 11,711.06 and 2,880.02 is: 4,318.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.02 : 11,711.06 = 2,880.02 : x
  2. Step 2: Convert to fraction form
    7,811.02/11,711.06 = 2,880.02/x
  3. Step 3: Cross multiply
    7,811.02x = 11,711.06 × 2,880.02
  4. Step 4: Simplify right side
    7,811.02x = 33,728,087.02
  5. Step 5: Solve for x
    x = 33,728,087.02/7,811.02
  6. Step 6: Final answer
    x = 4,318.01

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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.