Home / 21,311.94-29,410.86-11,879.48

Finding the Fourth Proportional to 21,311.94, 29,410.86 and 11,879.48

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Solution

The fourth proportional to 21,311.94, 29,410.86 and 11,879.48 is: 16,393.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.94 : 29,410.86 = 11,879.48 : x
  2. Step 2: Convert to fraction form
    21,311.94/29,410.86 = 11,879.48/x
  3. Step 3: Cross multiply
    21,311.94x = 29,410.86 × 11,879.48
  4. Step 4: Simplify right side
    21,311.94x = 349,385,723.15
  5. Step 5: Solve for x
    x = 349,385,723.15/21,311.94
  6. Step 6: Final answer
    x = 16,393.90

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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.