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Finding the Fourth Proportional to 13,879.08, 20,832.66 and 8,047.08

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Solution

The fourth proportional to 13,879.08, 20,832.66 and 8,047.08 is: 12,078.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.08 : 20,832.66 = 8,047.08 : x
  2. Step 2: Convert to fraction form
    13,879.08/20,832.66 = 8,047.08/x
  3. Step 3: Cross multiply
    13,879.08x = 20,832.66 × 8,047.08
  4. Step 4: Simplify right side
    13,879.08x = 167,642,081.63
  5. Step 5: Solve for x
    x = 167,642,081.63/13,879.08
  6. Step 6: Final answer
    x = 12,078.76

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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.