Home / 20,711.42-28,576.80-12,212.88

Finding the Fourth Proportional to 20,711.42, 28,576.80 and 12,212.88

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Solution

The fourth proportional to 20,711.42, 28,576.80 and 12,212.88 is: 16,850.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.42 : 28,576.80 = 12,212.88 : x
  2. Step 2: Convert to fraction form
    20,711.42/28,576.80 = 12,212.88/x
  3. Step 3: Cross multiply
    20,711.42x = 28,576.80 × 12,212.88
  4. Step 4: Simplify right side
    20,711.42x = 349,004,922.02
  5. Step 5: Solve for x
    x = 349,004,922.02/20,711.42
  6. Step 6: Final answer
    x = 16,850.84

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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.