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Finding the Fourth Proportional to 8,636.64, 11,918.07 and 4,859.79

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Solution

The fourth proportional to 8,636.64, 11,918.07 and 4,859.79 is: 6,706.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.64 : 11,918.07 = 4,859.79 : x
  2. Step 2: Convert to fraction form
    8,636.64/11,918.07 = 4,859.79/x
  3. Step 3: Cross multiply
    8,636.64x = 11,918.07 × 4,859.79
  4. Step 4: Simplify right side
    8,636.64x = 57,919,317.41
  5. Step 5: Solve for x
    x = 57,919,317.41/8,636.64
  6. Step 6: Final answer
    x = 6,706.23

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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.