Home / 20,291.37-27,979.31-13,111.83

Finding the Fourth Proportional to 20,291.37, 27,979.31 and 13,111.83

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Solution

The fourth proportional to 20,291.37, 27,979.31 and 13,111.83 is: 18,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.37 : 27,979.31 = 13,111.83 : x
  2. Step 2: Convert to fraction form
    20,291.37/27,979.31 = 13,111.83/x
  3. Step 3: Cross multiply
    20,291.37x = 27,979.31 × 13,111.83
  4. Step 4: Simplify right side
    20,291.37x = 366,859,890.68
  5. Step 5: Solve for x
    x = 366,859,890.68/20,291.37
  6. Step 6: Final answer
    x = 18,079.60

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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.