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Finding the Fourth Proportional to 18,469.70, 25,480.95 and 11,383.82

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Solution

The fourth proportional to 18,469.70, 25,480.95 and 11,383.82 is: 15,705.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,469.70 : 25,480.95 = 11,383.82 : x
  2. Step 2: Convert to fraction form
    18,469.70/25,480.95 = 11,383.82/x
  3. Step 3: Cross multiply
    18,469.70x = 25,480.95 × 11,383.82
  4. Step 4: Simplify right side
    18,469.70x = 290,070,548.23
  5. Step 5: Solve for x
    x = 290,070,548.23/18,469.70
  6. Step 6: Final answer
    x = 15,705.21

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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.