Home / 20,736.58-28,620.15-12,238.09

Finding the Fourth Proportional to 20,736.58, 28,620.15 and 12,238.09

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Solution

The fourth proportional to 20,736.58, 28,620.15 and 12,238.09 is: 16,890.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.58 : 28,620.15 = 12,238.09 : x
  2. Step 2: Convert to fraction form
    20,736.58/28,620.15 = 12,238.09/x
  3. Step 3: Cross multiply
    20,736.58x = 28,620.15 × 12,238.09
  4. Step 4: Simplify right side
    20,736.58x = 350,255,899.96
  5. Step 5: Solve for x
    x = 350,255,899.96/20,736.58
  6. Step 6: Final answer
    x = 16,890.73

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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.