Home / 20,409.93-28,169.44-11,917.08

Finding the Fourth Proportional to 20,409.93, 28,169.44 and 11,917.08

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Solution

The fourth proportional to 20,409.93, 28,169.44 and 11,917.08 is: 16,447.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.93 : 28,169.44 = 11,917.08 : x
  2. Step 2: Convert to fraction form
    20,409.93/28,169.44 = 11,917.08/x
  3. Step 3: Cross multiply
    20,409.93x = 28,169.44 × 11,917.08
  4. Step 4: Simplify right side
    20,409.93x = 335,697,440.24
  5. Step 5: Solve for x
    x = 335,697,440.24/20,409.93
  6. Step 6: Final answer
    x = 16,447.75

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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.