Home / 20,690.91-28,552.86-11,739.24

Finding the Fourth Proportional to 20,690.91, 28,552.86 and 11,739.24

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Solution

The fourth proportional to 20,690.91, 28,552.86 and 11,739.24 is: 16,199.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.91 : 28,552.86 = 11,739.24 : x
  2. Step 2: Convert to fraction form
    20,690.91/28,552.86 = 11,739.24/x
  3. Step 3: Cross multiply
    20,690.91x = 28,552.86 × 11,739.24
  4. Step 4: Simplify right side
    20,690.91x = 335,188,876.23
  5. Step 5: Solve for x
    x = 335,188,876.23/20,690.91
  6. Step 6: Final answer
    x = 16,199.81

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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.