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Finding the Fourth Proportional to 8,636.58, 11,889.65 and 8,239.83

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Solution

The fourth proportional to 8,636.58, 11,889.65 and 8,239.83 is: 11,343.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.58 : 11,889.65 = 8,239.83 : x
  2. Step 2: Convert to fraction form
    8,636.58/11,889.65 = 8,239.83/x
  3. Step 3: Cross multiply
    8,636.58x = 11,889.65 × 8,239.83
  4. Step 4: Simplify right side
    8,636.58x = 97,968,653.56
  5. Step 5: Solve for x
    x = 97,968,653.56/8,636.58
  6. Step 6: Final answer
    x = 11,343.45

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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.