Home / 20,893.98-28,817.40-12,940.62

Finding the Fourth Proportional to 20,893.98, 28,817.40 and 12,940.62

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Solution

The fourth proportional to 20,893.98, 28,817.40 and 12,940.62 is: 17,847.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.98 : 28,817.40 = 12,940.62 : x
  2. Step 2: Convert to fraction form
    20,893.98/28,817.40 = 12,940.62/x
  3. Step 3: Cross multiply
    20,893.98x = 28,817.40 × 12,940.62
  4. Step 4: Simplify right side
    20,893.98x = 372,915,022.79
  5. Step 5: Solve for x
    x = 372,915,022.79/20,893.98
  6. Step 6: Final answer
    x = 17,847.96

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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.