Home / 20,289.12-27,998.16-12,739.44

Finding the Fourth Proportional to 20,289.12, 27,998.16 and 12,739.44

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Solution

The fourth proportional to 20,289.12, 27,998.16 and 12,739.44 is: 17,579.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.12 : 27,998.16 = 12,739.44 : x
  2. Step 2: Convert to fraction form
    20,289.12/27,998.16 = 12,739.44/x
  3. Step 3: Cross multiply
    20,289.12x = 27,998.16 × 12,739.44
  4. Step 4: Simplify right side
    20,289.12x = 356,680,879.43
  5. Step 5: Solve for x
    x = 356,680,879.43/20,289.12
  6. Step 6: Final answer
    x = 17,579.91

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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.