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Finding the Fourth Proportional to 8,696.07, 12,939.50 and 8,666.91

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Solution

The fourth proportional to 8,696.07, 12,939.50 and 8,666.91 is: 12,896.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,696.07 : 12,939.50 = 8,666.91 : x
  2. Step 2: Convert to fraction form
    8,696.07/12,939.50 = 8,666.91/x
  3. Step 3: Cross multiply
    8,696.07x = 12,939.50 × 8,666.91
  4. Step 4: Simplify right side
    8,696.07x = 112,145,503.61
  5. Step 5: Solve for x
    x = 112,145,503.61/8,696.07
  6. Step 6: Final answer
    x = 12,896.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.