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Finding the Fourth Proportional to 18,589.85, 27,860.16 and 13,636.29

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Solution

The fourth proportional to 18,589.85, 27,860.16 and 13,636.29 is: 20,436.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,589.85 : 27,860.16 = 13,636.29 : x
  2. Step 2: Convert to fraction form
    18,589.85/27,860.16 = 13,636.29/x
  3. Step 3: Cross multiply
    18,589.85x = 27,860.16 × 13,636.29
  4. Step 4: Simplify right side
    18,589.85x = 379,909,221.21
  5. Step 5: Solve for x
    x = 379,909,221.21/18,589.85
  6. Step 6: Final answer
    x = 20,436.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.