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Finding the Fourth Proportional to 7,879.32, 11,798.10 and 4,755.15

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Solution

The fourth proportional to 7,879.32, 11,798.10 and 4,755.15 is: 7,120.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.32 : 11,798.10 = 4,755.15 : x
  2. Step 2: Convert to fraction form
    7,879.32/11,798.10 = 4,755.15/x
  3. Step 3: Cross multiply
    7,879.32x = 11,798.10 × 4,755.15
  4. Step 4: Simplify right side
    7,879.32x = 56,101,735.22
  5. Step 5: Solve for x
    x = 56,101,735.22/7,879.32
  6. Step 6: Final answer
    x = 7,120.12

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1.5x scale

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.