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Finding the Fourth Proportional to 18,860.94, 28,290.90 and 6,380.88

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Solution

The fourth proportional to 18,860.94, 28,290.90 and 6,380.88 is: 9,571.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.94 : 28,290.90 = 6,380.88 : x
  2. Step 2: Convert to fraction form
    18,860.94/28,290.90 = 6,380.88/x
  3. Step 3: Cross multiply
    18,860.94x = 28,290.90 × 6,380.88
  4. Step 4: Simplify right side
    18,860.94x = 180,520,837.99
  5. Step 5: Solve for x
    x = 180,520,837.99/18,860.94
  6. Step 6: Final answer
    x = 9,571.15

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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.