Home / 20,207.96-27,879.12-12,651.20

Finding the Fourth Proportional to 20,207.96, 27,879.12 and 12,651.20

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Solution

The fourth proportional to 20,207.96, 27,879.12 and 12,651.20 is: 17,453.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,207.96 : 27,879.12 = 12,651.20 : x
  2. Step 2: Convert to fraction form
    20,207.96/27,879.12 = 12,651.20/x
  3. Step 3: Cross multiply
    20,207.96x = 27,879.12 × 12,651.20
  4. Step 4: Simplify right side
    20,207.96x = 352,704,322.94
  5. Step 5: Solve for x
    x = 352,704,322.94/20,207.96
  6. Step 6: Final answer
    x = 17,453.73

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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.