Home / 20,382.24-28,128.24-11,889.84

Finding the Fourth Proportional to 20,382.24, 28,128.24 and 11,889.84

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Solution

The fourth proportional to 20,382.24, 28,128.24 and 11,889.84 is: 16,408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.24 : 28,128.24 = 11,889.84 : x
  2. Step 2: Convert to fraction form
    20,382.24/28,128.24 = 11,889.84/x
  3. Step 3: Cross multiply
    20,382.24x = 28,128.24 × 11,889.84
  4. Step 4: Simplify right side
    20,382.24x = 334,440,273.08
  5. Step 5: Solve for x
    x = 334,440,273.08/20,382.24
  6. Step 6: Final answer
    x = 16,408.42

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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.