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Finding the Fourth Proportional to 18,714.64, 28,068.12 and 7,027.60

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Solution

The fourth proportional to 18,714.64, 28,068.12 and 7,027.60 is: 10,539.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,714.64 : 28,068.12 = 7,027.60 : x
  2. Step 2: Convert to fraction form
    18,714.64/28,068.12 = 7,027.60/x
  3. Step 3: Cross multiply
    18,714.64x = 28,068.12 × 7,027.60
  4. Step 4: Simplify right side
    18,714.64x = 197,251,520.11
  5. Step 5: Solve for x
    x = 197,251,520.11/18,714.64
  6. Step 6: Final answer
    x = 10,539.96

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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.