Home / 20,728.41-28,608.87-12,230.02

Finding the Fourth Proportional to 20,728.41, 28,608.87 and 12,230.02

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Solution

The fourth proportional to 20,728.41, 28,608.87 and 12,230.02 is: 16,879.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.41 : 28,608.87 = 12,230.02 : x
  2. Step 2: Convert to fraction form
    20,728.41/28,608.87 = 12,230.02/x
  3. Step 3: Cross multiply
    20,728.41x = 28,608.87 × 12,230.02
  4. Step 4: Simplify right side
    20,728.41x = 349,887,052.28
  5. Step 5: Solve for x
    x = 349,887,052.28/20,728.41
  6. Step 6: Final answer
    x = 16,879.59

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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.