Home / 28,866.54-39,847.23-21,790.38

Finding the Fourth Proportional to 28,866.54, 39,847.23 and 21,790.38

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Solution

The fourth proportional to 28,866.54, 39,847.23 and 21,790.38 is: 30,079.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,866.54 : 39,847.23 = 21,790.38 : x
  2. Step 2: Convert to fraction form
    28,866.54/39,847.23 = 21,790.38/x
  3. Step 3: Cross multiply
    28,866.54x = 39,847.23 × 21,790.38
  4. Step 4: Simplify right side
    28,866.54x = 868,286,283.65
  5. Step 5: Solve for x
    x = 868,286,283.65/28,866.54
  6. Step 6: Final answer
    x = 30,079.33

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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.