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Finding the Fourth Proportional to 28,481.60, 42,722.40 and 16,817.60

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Solution

The fourth proportional to 28,481.60, 42,722.40 and 16,817.60 is: 25,226.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,481.60 : 42,722.40 = 16,817.60 : x
  2. Step 2: Convert to fraction form
    28,481.60/42,722.40 = 16,817.60/x
  3. Step 3: Cross multiply
    28,481.60x = 42,722.40 × 16,817.60
  4. Step 4: Simplify right side
    28,481.60x = 718,488,234.24
  5. Step 5: Solve for x
    x = 718,488,234.24/28,481.60
  6. Step 6: Final answer
    x = 25,226.40

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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.