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Finding the Fourth Proportional to 18,745.70, 25,865.87 and 11,195.06

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Solution

The fourth proportional to 18,745.70, 25,865.87 and 11,195.06 is: 15,447.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.70 : 25,865.87 = 11,195.06 : x
  2. Step 2: Convert to fraction form
    18,745.70/25,865.87 = 11,195.06/x
  3. Step 3: Cross multiply
    18,745.70x = 25,865.87 × 11,195.06
  4. Step 4: Simplify right side
    18,745.70x = 289,569,781.30
  5. Step 5: Solve for x
    x = 289,569,781.30/18,745.70
  6. Step 6: Final answer
    x = 15,447.27

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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.