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Finding the Fourth Proportional to 6,879.76, 9,499 and 4,230.72

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Solution

The fourth proportional to 6,879.76, 9,499 and 4,230.72 is: 5,841.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,879.76 : 9,499 = 4,230.72 : x
  2. Step 2: Convert to fraction form
    6,879.76/9,499 = 4,230.72/x
  3. Step 3: Cross multiply
    6,879.76x = 9,499 × 4,230.72
  4. Step 4: Simplify right side
    6,879.76x = 40,187,609.28
  5. Step 5: Solve for x
    x = 40,187,609.28/6,879.76
  6. Step 6: Final answer
    x = 5,841.43

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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.