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Finding the Fourth Proportional to 9,343.69, 12,879.25 and 6,821.80

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Solution

The fourth proportional to 9,343.69, 12,879.25 and 6,821.80 is: 9,403.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,343.69 : 12,879.25 = 6,821.80 : x
  2. Step 2: Convert to fraction form
    9,343.69/12,879.25 = 6,821.80/x
  3. Step 3: Cross multiply
    9,343.69x = 12,879.25 × 6,821.80
  4. Step 4: Simplify right side
    9,343.69x = 87,859,729.22
  5. Step 5: Solve for x
    x = 87,859,729.22/9,343.69
  6. Step 6: Final answer
    x = 9,403.11

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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.