Home / 20,165.11-27,828.49-11,212.99

Finding the Fourth Proportional to 20,165.11, 27,828.49 and 11,212.99

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Solution

The fourth proportional to 20,165.11, 27,828.49 and 11,212.99 is: 15,474.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,165.11 : 27,828.49 = 11,212.99 : x
  2. Step 2: Convert to fraction form
    20,165.11/27,828.49 = 11,212.99/x
  3. Step 3: Cross multiply
    20,165.11x = 27,828.49 × 11,212.99
  4. Step 4: Simplify right side
    20,165.11x = 312,040,440.94
  5. Step 5: Solve for x
    x = 312,040,440.94/20,165.11
  6. Step 6: Final answer
    x = 15,474.28

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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.