Home / 20,288.88-27,982.85-13,021.68

Finding the Fourth Proportional to 20,288.88, 27,982.85 and 13,021.68

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Solution

The fourth proportional to 20,288.88, 27,982.85 and 13,021.68 is: 17,959.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.88 : 27,982.85 = 13,021.68 : x
  2. Step 2: Convert to fraction form
    20,288.88/27,982.85 = 13,021.68/x
  3. Step 3: Cross multiply
    20,288.88x = 27,982.85 × 13,021.68
  4. Step 4: Simplify right side
    20,288.88x = 364,383,653.08
  5. Step 5: Solve for x
    x = 364,383,653.08/20,288.88
  6. Step 6: Final answer
    x = 17,959.77

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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.