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Finding the Fourth Proportional to 8,239.56, 11,372.76 and 6,645.48

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Solution

The fourth proportional to 8,239.56, 11,372.76 and 6,645.48 is: 9,172.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,239.56 : 11,372.76 = 6,645.48 : x
  2. Step 2: Convert to fraction form
    8,239.56/11,372.76 = 6,645.48/x
  3. Step 3: Cross multiply
    8,239.56x = 11,372.76 × 6,645.48
  4. Step 4: Simplify right side
    8,239.56x = 75,577,449.12
  5. Step 5: Solve for x
    x = 75,577,449.12/8,239.56
  6. Step 6: Final answer
    x = 9,172.51

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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.