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Finding the Fourth Proportional to 8,679.45, 11,968.68 and 7,424.66

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Solution

The fourth proportional to 8,679.45, 11,968.68 and 7,424.66 is: 10,238.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.45 : 11,968.68 = 7,424.66 : x
  2. Step 2: Convert to fraction form
    8,679.45/11,968.68 = 7,424.66/x
  3. Step 3: Cross multiply
    8,679.45x = 11,968.68 × 7,424.66
  4. Step 4: Simplify right side
    8,679.45x = 88,863,328.33
  5. Step 5: Solve for x
    x = 88,863,328.33/8,679.45
  6. Step 6: Final answer
    x = 10,238.36

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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.