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Finding the Fourth Proportional to 18,982.80, 26,063.46 and 15,418.80

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Solution

The fourth proportional to 18,982.80, 26,063.46 and 15,418.80 is: 21,170.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,982.80 : 26,063.46 = 15,418.80 : x
  2. Step 2: Convert to fraction form
    18,982.80/26,063.46 = 15,418.80/x
  3. Step 3: Cross multiply
    18,982.80x = 26,063.46 × 15,418.80
  4. Step 4: Simplify right side
    18,982.80x = 401,867,277.05
  5. Step 5: Solve for x
    x = 401,867,277.05/18,982.80
  6. Step 6: Final answer
    x = 21,170.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.