Home / 20,942.16-28,900.27-11,511.33

Finding the Fourth Proportional to 20,942.16, 28,900.27 and 11,511.33

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Solution

The fourth proportional to 20,942.16, 28,900.27 and 11,511.33 is: 15,885.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.16 : 28,900.27 = 11,511.33 : x
  2. Step 2: Convert to fraction form
    20,942.16/28,900.27 = 11,511.33/x
  3. Step 3: Cross multiply
    20,942.16x = 28,900.27 × 11,511.33
  4. Step 4: Simplify right side
    20,942.16x = 332,680,400.56
  5. Step 5: Solve for x
    x = 332,680,400.56/20,942.16
  6. Step 6: Final answer
    x = 15,885.68

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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.