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Finding the Fourth Proportional to 18,819.59, 28,234.13 and 13,283.75

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Solution

The fourth proportional to 18,819.59, 28,234.13 and 13,283.75 is: 19,928.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.59 : 28,234.13 = 13,283.75 : x
  2. Step 2: Convert to fraction form
    18,819.59/28,234.13 = 13,283.75/x
  3. Step 3: Cross multiply
    18,819.59x = 28,234.13 × 13,283.75
  4. Step 4: Simplify right side
    18,819.59x = 375,055,128.55
  5. Step 5: Solve for x
    x = 375,055,128.55/18,819.59
  6. Step 6: Final answer
    x = 19,928.98

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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.