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Finding the Fourth Proportional to 8,880, 13,322.61 and 2,640.06

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Solution

The fourth proportional to 8,880, 13,322.61 and 2,640.06 is: 3,960.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,880 : 13,322.61 = 2,640.06 : x
  2. Step 2: Convert to fraction form
    8,880/13,322.61 = 2,640.06/x
  3. Step 3: Cross multiply
    8,880x = 13,322.61 × 2,640.06
  4. Step 4: Simplify right side
    8,880x = 35,172,489.76
  5. Step 5: Solve for x
    x = 35,172,489.76/8,880
  6. Step 6: Final answer
    x = 3,960.87

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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.