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Finding the Fourth Proportional to 8,722.61, 11,876.13 and 8,694.93

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Solution

The fourth proportional to 8,722.61, 11,876.13 and 8,694.93 is: 11,838.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,722.61 : 11,876.13 = 8,694.93 : x
  2. Step 2: Convert to fraction form
    8,722.61/11,876.13 = 8,694.93/x
  3. Step 3: Cross multiply
    8,722.61x = 11,876.13 × 8,694.93
  4. Step 4: Simplify right side
    8,722.61x = 103,262,059.64
  5. Step 5: Solve for x
    x = 103,262,059.64/8,722.61
  6. Step 6: Final answer
    x = 11,838.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.