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Finding the Fourth Proportional to 8,636.43, 11,918.16 and 4,910.43

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Solution

The fourth proportional to 8,636.43, 11,918.16 and 4,910.43 is: 6,776.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.43 : 11,918.16 = 4,910.43 : x
  2. Step 2: Convert to fraction form
    8,636.43/11,918.16 = 4,910.43/x
  3. Step 3: Cross multiply
    8,636.43x = 11,918.16 × 4,910.43
  4. Step 4: Simplify right side
    8,636.43x = 58,523,290.41
  5. Step 5: Solve for x
    x = 58,523,290.41/8,636.43
  6. Step 6: Final answer
    x = 6,776.33

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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.