Home / 20,688.94-28,550.70-11,738.20

Finding the Fourth Proportional to 20,688.94, 28,550.70 and 11,738.20

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Solution

The fourth proportional to 20,688.94, 28,550.70 and 11,738.20 is: 16,198.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.94 : 28,550.70 = 11,738.20 : x
  2. Step 2: Convert to fraction form
    20,688.94/28,550.70 = 11,738.20/x
  3. Step 3: Cross multiply
    20,688.94x = 28,550.70 × 11,738.20
  4. Step 4: Simplify right side
    20,688.94x = 335,133,826.74
  5. Step 5: Solve for x
    x = 335,133,826.74/20,688.94
  6. Step 6: Final answer
    x = 16,198.69

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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.