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Finding the Fourth Proportional to 18,591.35, 25,645.34 and 11,869.40

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Solution

The fourth proportional to 18,591.35, 25,645.34 and 11,869.40 is: 16,372.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,591.35 : 25,645.34 = 11,869.40 : x
  2. Step 2: Convert to fraction form
    18,591.35/25,645.34 = 11,869.40/x
  3. Step 3: Cross multiply
    18,591.35x = 25,645.34 × 11,869.40
  4. Step 4: Simplify right side
    18,591.35x = 304,394,611.02
  5. Step 5: Solve for x
    x = 304,394,611.02/18,591.35
  6. Step 6: Final answer
    x = 16,372.92

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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.