Home / 20,975.22-28,942.52-12,021.48

Finding the Fourth Proportional to 20,975.22, 28,942.52 and 12,021.48

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Solution

The fourth proportional to 20,975.22, 28,942.52 and 12,021.48 is: 16,587.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.22 : 28,942.52 = 12,021.48 : x
  2. Step 2: Convert to fraction form
    20,975.22/28,942.52 = 12,021.48/x
  3. Step 3: Cross multiply
    20,975.22x = 28,942.52 × 12,021.48
  4. Step 4: Simplify right side
    20,975.22x = 347,931,865.22
  5. Step 5: Solve for x
    x = 347,931,865.22/20,975.22
  6. Step 6: Final answer
    x = 16,587.76

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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.