Home / 20,786.19-28,683.60-11,354.75

Finding the Fourth Proportional to 20,786.19, 28,683.60 and 11,354.75

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Solution

The fourth proportional to 20,786.19, 28,683.60 and 11,354.75 is: 15,668.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.19 : 28,683.60 = 11,354.75 : x
  2. Step 2: Convert to fraction form
    20,786.19/28,683.60 = 11,354.75/x
  3. Step 3: Cross multiply
    20,786.19x = 28,683.60 × 11,354.75
  4. Step 4: Simplify right side
    20,786.19x = 325,694,963.68
  5. Step 5: Solve for x
    x = 325,694,963.68/20,786.19
  6. Step 6: Final answer
    x = 15,668.81

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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.