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Finding the Fourth Proportional to 18,589.34, 27,859.41 and 13,635.79

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Solution

The fourth proportional to 18,589.34, 27,859.41 and 13,635.79 is: 20,435.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,589.34 : 27,859.41 = 13,635.79 : x
  2. Step 2: Convert to fraction form
    18,589.34/27,859.41 = 13,635.79/x
  3. Step 3: Cross multiply
    18,589.34x = 27,859.41 × 13,635.79
  4. Step 4: Simplify right side
    18,589.34x = 379,885,064.28
  5. Step 5: Solve for x
    x = 379,885,064.28/18,589.34
  6. Step 6: Final answer
    x = 20,435.64

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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.