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Finding the Fourth Proportional to 8,489.89, 12,736.23 and 2,645.32

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Solution

The fourth proportional to 8,489.89, 12,736.23 and 2,645.32 is: 3,968.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489.89 : 12,736.23 = 2,645.32 : x
  2. Step 2: Convert to fraction form
    8,489.89/12,736.23 = 2,645.32/x
  3. Step 3: Cross multiply
    8,489.89x = 12,736.23 × 2,645.32
  4. Step 4: Simplify right side
    8,489.89x = 33,691,403.94
  5. Step 5: Solve for x
    x = 33,691,403.94/8,489.89
  6. Step 6: Final answer
    x = 3,968.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.