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Finding the Fourth Proportional to 28,906.26, 39,893.78 and 16,971.32

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Solution

The fourth proportional to 28,906.26, 39,893.78 and 16,971.32 is: 23,422.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.26 : 39,893.78 = 16,971.32 : x
  2. Step 2: Convert to fraction form
    28,906.26/39,893.78 = 16,971.32/x
  3. Step 3: Cross multiply
    28,906.26x = 39,893.78 × 16,971.32
  4. Step 4: Simplify right side
    28,906.26x = 677,050,106.39
  5. Step 5: Solve for x
    x = 677,050,106.39/28,906.26
  6. Step 6: Final answer
    x = 23,422.27

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1.5x scale

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.