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Finding the Fourth Proportional to 22,963.91, 31,689.90 and 12,892.08

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Solution

The fourth proportional to 22,963.91, 31,689.90 and 12,892.08 is: 17,790.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,963.91 : 31,689.90 = 12,892.08 : x
  2. Step 2: Convert to fraction form
    22,963.91/31,689.90 = 12,892.08/x
  3. Step 3: Cross multiply
    22,963.91x = 31,689.90 × 12,892.08
  4. Step 4: Simplify right side
    22,963.91x = 408,548,725.99
  5. Step 5: Solve for x
    x = 408,548,725.99/22,963.91
  6. Step 6: Final answer
    x = 17,790.91

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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.