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Finding the Fourth Proportional to 18,399.70, 25,335.36 and 13,868.97

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Solution

The fourth proportional to 18,399.70, 25,335.36 and 13,868.97 is: 19,096.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399.70 : 25,335.36 = 13,868.97 : x
  2. Step 2: Convert to fraction form
    18,399.70/25,335.36 = 13,868.97/x
  3. Step 3: Cross multiply
    18,399.70x = 25,335.36 × 13,868.97
  4. Step 4: Simplify right side
    18,399.70x = 351,375,347.78
  5. Step 5: Solve for x
    x = 351,375,347.78/18,399.70
  6. Step 6: Final answer
    x = 19,096.80

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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.