Home / 20,843.80-28,762.41-11,893.30

Finding the Fourth Proportional to 20,843.80, 28,762.41 and 11,893.30

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Solution

The fourth proportional to 20,843.80, 28,762.41 and 11,893.30 is: 16,411.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.80 : 28,762.41 = 11,893.30 : x
  2. Step 2: Convert to fraction form
    20,843.80/28,762.41 = 11,893.30/x
  3. Step 3: Cross multiply
    20,843.80x = 28,762.41 × 11,893.30
  4. Step 4: Simplify right side
    20,843.80x = 342,079,970.85
  5. Step 5: Solve for x
    x = 342,079,970.85/20,843.80
  6. Step 6: Final answer
    x = 16,411.59

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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.