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Finding the Fourth Proportional to 18,884.52, 28,287.90 and 11,074.50

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Solution

The fourth proportional to 18,884.52, 28,287.90 and 11,074.50 is: 16,588.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,884.52 : 28,287.90 = 11,074.50 : x
  2. Step 2: Convert to fraction form
    18,884.52/28,287.90 = 11,074.50/x
  3. Step 3: Cross multiply
    18,884.52x = 28,287.90 × 11,074.50
  4. Step 4: Simplify right side
    18,884.52x = 313,274,348.55
  5. Step 5: Solve for x
    x = 313,274,348.55/18,884.52
  6. Step 6: Final answer
    x = 16,588.95

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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.