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Finding the Fourth Proportional to 28,696.48, 43,047.20 and 7,919.98

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Solution

The fourth proportional to 28,696.48, 43,047.20 and 7,919.98 is: 11,880.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,696.48 : 43,047.20 = 7,919.98 : x
  2. Step 2: Convert to fraction form
    28,696.48/43,047.20 = 7,919.98/x
  3. Step 3: Cross multiply
    28,696.48x = 43,047.20 × 7,919.98
  4. Step 4: Simplify right side
    28,696.48x = 340,932,923.46
  5. Step 5: Solve for x
    x = 340,932,923.46/28,696.48
  6. Step 6: Final answer
    x = 11,880.65

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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.