Home / 20,844.75-28,768.50-11,890.20

Finding the Fourth Proportional to 20,844.75, 28,768.50 and 11,890.20

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Solution

The fourth proportional to 20,844.75, 28,768.50 and 11,890.20 is: 16,410.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,844.75 : 28,768.50 = 11,890.20 : x
  2. Step 2: Convert to fraction form
    20,844.75/28,768.50 = 11,890.20/x
  3. Step 3: Cross multiply
    20,844.75x = 28,768.50 × 11,890.20
  4. Step 4: Simplify right side
    20,844.75x = 342,063,218.70
  5. Step 5: Solve for x
    x = 342,063,218.70/20,844.75
  6. Step 6: Final answer
    x = 16,410.04

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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.