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Finding the Fourth Proportional to 7,879.76, 10,874.03 and 4,342.96

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Solution

The fourth proportional to 7,879.76, 10,874.03 and 4,342.96 is: 5,993.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.76 : 10,874.03 = 4,342.96 : x
  2. Step 2: Convert to fraction form
    7,879.76/10,874.03 = 4,342.96/x
  3. Step 3: Cross multiply
    7,879.76x = 10,874.03 × 4,342.96
  4. Step 4: Simplify right side
    7,879.76x = 47,225,477.33
  5. Step 5: Solve for x
    x = 47,225,477.33/7,879.76
  6. Step 6: Final answer
    x = 5,993.26

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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.