Home / 20,621.97-28,456.75-12,124.44

Finding the Fourth Proportional to 20,621.97, 28,456.75 and 12,124.44

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Solution

The fourth proportional to 20,621.97, 28,456.75 and 12,124.44 is: 16,730.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.97 : 28,456.75 = 12,124.44 : x
  2. Step 2: Convert to fraction form
    20,621.97/28,456.75 = 12,124.44/x
  3. Step 3: Cross multiply
    20,621.97x = 28,456.75 × 12,124.44
  4. Step 4: Simplify right side
    20,621.97x = 345,022,157.97
  5. Step 5: Solve for x
    x = 345,022,157.97/20,621.97
  6. Step 6: Final answer
    x = 16,730.80

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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.