Home / 20,390.73-28,122.98-16,847.79

Finding the Fourth Proportional to 20,390.73, 28,122.98 and 16,847.79

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Solution

The fourth proportional to 20,390.73, 28,122.98 and 16,847.79 is: 23,236.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.73 : 28,122.98 = 16,847.79 : x
  2. Step 2: Convert to fraction form
    20,390.73/28,122.98 = 16,847.79/x
  3. Step 3: Cross multiply
    20,390.73x = 28,122.98 × 16,847.79
  4. Step 4: Simplify right side
    20,390.73x = 473,809,976.98
  5. Step 5: Solve for x
    x = 473,809,976.98/20,390.73
  6. Step 6: Final answer
    x = 23,236.54

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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.