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Finding the Fourth Proportional to 18,698.80, 25,801.38 and 11,144.96

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Solution

The fourth proportional to 18,698.80, 25,801.38 and 11,144.96 is: 15,378.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.80 : 25,801.38 = 11,144.96 : x
  2. Step 2: Convert to fraction form
    18,698.80/25,801.38 = 11,144.96/x
  3. Step 3: Cross multiply
    18,698.80x = 25,801.38 × 11,144.96
  4. Step 4: Simplify right side
    18,698.80x = 287,555,348.04
  5. Step 5: Solve for x
    x = 287,555,348.04/18,698.80
  6. Step 6: Final answer
    x = 15,378.28

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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.