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Finding the Fourth Proportional to 18,375.75, 27,479.52 and 13,698.95

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Solution

The fourth proportional to 18,375.75, 27,479.52 and 13,698.95 is: 20,485.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,375.75 : 27,479.52 = 13,698.95 : x
  2. Step 2: Convert to fraction form
    18,375.75/27,479.52 = 13,698.95/x
  3. Step 3: Cross multiply
    18,375.75x = 27,479.52 × 13,698.95
  4. Step 4: Simplify right side
    18,375.75x = 376,440,433.11
  5. Step 5: Solve for x
    x = 376,440,433.11/18,375.75
  6. Step 6: Final answer
    x = 20,485.72

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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.