Home / 18,942.90-28,382.00-13,385.49

Finding the Fourth Proportional to 18,942.90, 28,382.00 and 13,385.49

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Solution

The fourth proportional to 18,942.90, 28,382.00 and 13,385.49 is: 20,055.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,942.90 : 28,382.00 = 13,385.49 : x
  2. Step 2: Convert to fraction form
    18,942.90/28,382.00 = 13,385.49/x
  3. Step 3: Cross multiply
    18,942.90x = 28,382.00 × 13,385.49
  4. Step 4: Simplify right side
    18,942.90x = 379,906,910.25
  5. Step 5: Solve for x
    x = 379,906,910.25/18,942.90
  6. Step 6: Final answer
    x = 20,055.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.