Home / 20,883.39-28,804.20-13,819.38

Finding the Fourth Proportional to 20,883.39, 28,804.20 and 13,819.38

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Solution

The fourth proportional to 20,883.39, 28,804.20 and 13,819.38 is: 19,060.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.39 : 28,804.20 = 13,819.38 : x
  2. Step 2: Convert to fraction form
    20,883.39/28,804.20 = 13,819.38/x
  3. Step 3: Cross multiply
    20,883.39x = 28,804.20 × 13,819.38
  4. Step 4: Simplify right side
    20,883.39x = 398,056,185.40
  5. Step 5: Solve for x
    x = 398,056,185.40/20,883.39
  6. Step 6: Final answer
    x = 19,060.90

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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.