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Finding the Fourth Proportional to 28,713, 39,620.40 and 16,767.66

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Solution

The fourth proportional to 28,713, 39,620.40 and 16,767.66 is: 23,137.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,713 : 39,620.40 = 16,767.66 : x
  2. Step 2: Convert to fraction form
    28,713/39,620.40 = 16,767.66/x
  3. Step 3: Cross multiply
    28,713x = 39,620.40 × 16,767.66
  4. Step 4: Simplify right side
    28,713x = 664,341,396.26
  5. Step 5: Solve for x
    x = 664,341,396.26/28,713
  6. Step 6: Final answer
    x = 23,137.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.