Home / 20,800.75-28,705.04-11,849.09

Finding the Fourth Proportional to 20,800.75, 28,705.04 and 11,849.09

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Solution

The fourth proportional to 20,800.75, 28,705.04 and 11,849.09 is: 16,351.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.75 : 28,705.04 = 11,849.09 : x
  2. Step 2: Convert to fraction form
    20,800.75/28,705.04 = 11,849.09/x
  3. Step 3: Cross multiply
    20,800.75x = 28,705.04 × 11,849.09
  4. Step 4: Simplify right side
    20,800.75x = 340,128,399.64
  5. Step 5: Solve for x
    x = 340,128,399.64/20,800.75
  6. Step 6: Final answer
    x = 16,351.74

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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.