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Finding the Fourth Proportional to 13,611.96, 18,786.03 and 7,645.53

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Solution

The fourth proportional to 13,611.96, 18,786.03 and 7,645.53 is: 10,551.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.96 : 18,786.03 = 7,645.53 : x
  2. Step 2: Convert to fraction form
    13,611.96/18,786.03 = 7,645.53/x
  3. Step 3: Cross multiply
    13,611.96x = 18,786.03 × 7,645.53
  4. Step 4: Simplify right side
    13,611.96x = 143,629,155.95
  5. Step 5: Solve for x
    x = 143,629,155.95/13,611.96
  6. Step 6: Final answer
    x = 10,551.69

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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.