Home / 20,938.44-28,894.71-11,506.80

Finding the Fourth Proportional to 20,938.44, 28,894.71 and 11,506.80

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Solution

The fourth proportional to 20,938.44, 28,894.71 and 11,506.80 is: 15,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.44 : 28,894.71 = 11,506.80 : x
  2. Step 2: Convert to fraction form
    20,938.44/28,894.71 = 11,506.80/x
  3. Step 3: Cross multiply
    20,938.44x = 28,894.71 × 11,506.80
  4. Step 4: Simplify right side
    20,938.44x = 332,485,649.03
  5. Step 5: Solve for x
    x = 332,485,649.03/20,938.44
  6. Step 6: Final answer
    x = 15,879.20

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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.