Home / 20,874.80-28,806.60-11,443.04

Finding the Fourth Proportional to 20,874.80, 28,806.60 and 11,443.04

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Solution

The fourth proportional to 20,874.80, 28,806.60 and 11,443.04 is: 15,791.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.80 : 28,806.60 = 11,443.04 : x
  2. Step 2: Convert to fraction form
    20,874.80/28,806.60 = 11,443.04/x
  3. Step 3: Cross multiply
    20,874.80x = 28,806.60 × 11,443.04
  4. Step 4: Simplify right side
    20,874.80x = 329,635,076.06
  5. Step 5: Solve for x
    x = 329,635,076.06/20,874.80
  6. Step 6: Final answer
    x = 15,791.05

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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.