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Finding the Fourth Proportional to 8,379.68, 12,559.80 and 6,738.08

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Solution

The fourth proportional to 8,379.68, 12,559.80 and 6,738.08 is: 10,099.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.68 : 12,559.80 = 6,738.08 : x
  2. Step 2: Convert to fraction form
    8,379.68/12,559.80 = 6,738.08/x
  3. Step 3: Cross multiply
    8,379.68x = 12,559.80 × 6,738.08
  4. Step 4: Simplify right side
    8,379.68x = 84,628,937.18
  5. Step 5: Solve for x
    x = 84,628,937.18/8,379.68
  6. Step 6: Final answer
    x = 10,099.30

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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.