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Finding the Fourth Proportional to 28,906.77, 39,894.47 and 16,971.82

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Solution

The fourth proportional to 28,906.77, 39,894.47 and 16,971.82 is: 23,422.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.77 : 39,894.47 = 16,971.82 : x
  2. Step 2: Convert to fraction form
    28,906.77/39,894.47 = 16,971.82/x
  3. Step 3: Cross multiply
    28,906.77x = 39,894.47 × 16,971.82
  4. Step 4: Simplify right side
    28,906.77x = 677,081,763.84
  5. Step 5: Solve for x
    x = 677,081,763.84/28,906.77
  6. Step 6: Final answer
    x = 23,422.95

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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.