Home / 21,879.12-32,826.24-12,005.76

Finding the Fourth Proportional to 21,879.12, 32,826.24 and 12,005.76

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Solution

The fourth proportional to 21,879.12, 32,826.24 and 12,005.76 is: 18,012.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.12 : 32,826.24 = 12,005.76 : x
  2. Step 2: Convert to fraction form
    21,879.12/32,826.24 = 12,005.76/x
  3. Step 3: Cross multiply
    21,879.12x = 32,826.24 × 12,005.76
  4. Step 4: Simplify right side
    21,879.12x = 394,103,959.14
  5. Step 5: Solve for x
    x = 394,103,959.14/21,879.12
  6. Step 6: Final answer
    x = 18,012.79

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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.