Home / 20,857.22-28,783.43-11,904.55

Finding the Fourth Proportional to 20,857.22, 28,783.43 and 11,904.55

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Solution

The fourth proportional to 20,857.22, 28,783.43 and 11,904.55 is: 16,428.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.22 : 28,783.43 = 11,904.55 : x
  2. Step 2: Convert to fraction form
    20,857.22/28,783.43 = 11,904.55/x
  3. Step 3: Cross multiply
    20,857.22x = 28,783.43 × 11,904.55
  4. Step 4: Simplify right side
    20,857.22x = 342,653,739.41
  5. Step 5: Solve for x
    x = 342,653,739.41/20,857.22
  6. Step 6: Final answer
    x = 16,428.54

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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.