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Finding the Fourth Proportional to 8,685.92, 11,940.21 and 8,631.26

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Solution

The fourth proportional to 8,685.92, 11,940.21 and 8,631.26 is: 11,865.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.92 : 11,940.21 = 8,631.26 : x
  2. Step 2: Convert to fraction form
    8,685.92/11,940.21 = 8,631.26/x
  3. Step 3: Cross multiply
    8,685.92x = 11,940.21 × 8,631.26
  4. Step 4: Simplify right side
    8,685.92x = 103,059,013.81
  5. Step 5: Solve for x
    x = 103,059,013.81/8,685.92
  6. Step 6: Final answer
    x = 11,865.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.