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Finding the Fourth Proportional to 28,696.10, 43,046.62 and 7,919.60

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Solution

The fourth proportional to 28,696.10, 43,046.62 and 7,919.60 is: 11,880.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,696.10 : 43,046.62 = 7,919.60 : x
  2. Step 2: Convert to fraction form
    28,696.10/43,046.62 = 7,919.60/x
  3. Step 3: Cross multiply
    28,696.10x = 43,046.62 × 7,919.60
  4. Step 4: Simplify right side
    28,696.10x = 340,912,011.75
  5. Step 5: Solve for x
    x = 340,912,011.75/28,696.10
  6. Step 6: Final answer
    x = 11,880.08

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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.