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Finding the Fourth Proportional to 28,940.78, 43,404.60 and 8,165.90

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Solution

The fourth proportional to 28,940.78, 43,404.60 and 8,165.90 is: 12,247.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,940.78 : 43,404.60 = 8,165.90 : x
  2. Step 2: Convert to fraction form
    28,940.78/43,404.60 = 8,165.90/x
  3. Step 3: Cross multiply
    28,940.78x = 43,404.60 × 8,165.90
  4. Step 4: Simplify right side
    28,940.78x = 354,437,623.14
  5. Step 5: Solve for x
    x = 354,437,623.14/28,940.78
  6. Step 6: Final answer
    x = 12,247.00

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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.