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Finding the Fourth Proportional to 28,782.91, 43,174.41 and 11,240.41

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Solution

The fourth proportional to 28,782.91, 43,174.41 and 11,240.41 is: 16,860.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,782.91 : 43,174.41 = 11,240.41 : x
  2. Step 2: Convert to fraction form
    28,782.91/43,174.41 = 11,240.41/x
  3. Step 3: Cross multiply
    28,782.91x = 43,174.41 × 11,240.41
  4. Step 4: Simplify right side
    28,782.91x = 485,298,069.91
  5. Step 5: Solve for x
    x = 485,298,069.91/28,782.91
  6. Step 6: Final answer
    x = 16,860.63

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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.