Home / 20,369.92-28,112.64-11,986.24

Finding the Fourth Proportional to 20,369.92, 28,112.64 and 11,986.24

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Solution

The fourth proportional to 20,369.92, 28,112.64 and 11,986.24 is: 16,542.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.92 : 28,112.64 = 11,986.24 : x
  2. Step 2: Convert to fraction form
    20,369.92/28,112.64 = 11,986.24/x
  3. Step 3: Cross multiply
    20,369.92x = 28,112.64 × 11,986.24
  4. Step 4: Simplify right side
    20,369.92x = 336,964,850.07
  5. Step 5: Solve for x
    x = 336,964,850.07/20,369.92
  6. Step 6: Final answer
    x = 16,542.28

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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.