Home / 20,942.93-28,900.91-11,511.29

Finding the Fourth Proportional to 20,942.93, 28,900.91 and 11,511.29

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Solution

The fourth proportional to 20,942.93, 28,900.91 and 11,511.29 is: 15,885.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.93 : 28,900.91 = 11,511.29 : x
  2. Step 2: Convert to fraction form
    20,942.93/28,900.91 = 11,511.29/x
  3. Step 3: Cross multiply
    20,942.93x = 28,900.91 × 11,511.29
  4. Step 4: Simplify right side
    20,942.93x = 332,686,554.21
  5. Step 5: Solve for x
    x = 332,686,554.21/20,942.93
  6. Step 6: Final answer
    x = 15,885.39

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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.