Home / 20,917.85-28,866.27-11,486.35

Finding the Fourth Proportional to 20,917.85, 28,866.27 and 11,486.35

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Solution

The fourth proportional to 20,917.85, 28,866.27 and 11,486.35 is: 15,850.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.85 : 28,866.27 = 11,486.35 : x
  2. Step 2: Convert to fraction form
    20,917.85/28,866.27 = 11,486.35/x
  3. Step 3: Cross multiply
    20,917.85x = 28,866.27 × 11,486.35
  4. Step 4: Simplify right side
    20,917.85x = 331,568,036.96
  5. Step 5: Solve for x
    x = 331,568,036.96/20,917.85
  6. Step 6: Final answer
    x = 15,850.96

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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.