Home / 20,863.25-28,786.60-11,907.89

Finding the Fourth Proportional to 20,863.25, 28,786.60 and 11,907.89

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Solution

The fourth proportional to 20,863.25, 28,786.60 and 11,907.89 is: 16,430.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.25 : 28,786.60 = 11,907.89 : x
  2. Step 2: Convert to fraction form
    20,863.25/28,786.60 = 11,907.89/x
  3. Step 3: Cross multiply
    20,863.25x = 28,786.60 × 11,907.89
  4. Step 4: Simplify right side
    20,863.25x = 342,787,666.27
  5. Step 5: Solve for x
    x = 342,787,666.27/20,863.25
  6. Step 6: Final answer
    x = 16,430.21

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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.