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Finding the Fourth Proportional to 28,893.61, 39,872.81 and 16,954.72

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Solution

The fourth proportional to 28,893.61, 39,872.81 and 16,954.72 is: 23,397.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,893.61 : 39,872.81 = 16,954.72 : x
  2. Step 2: Convert to fraction form
    28,893.61/39,872.81 = 16,954.72/x
  3. Step 3: Cross multiply
    28,893.61x = 39,872.81 × 16,954.72
  4. Step 4: Simplify right side
    28,893.61x = 676,032,176.50
  5. Step 5: Solve for x
    x = 676,032,176.50/28,893.61
  6. Step 6: Final answer
    x = 23,397.29

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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.