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Finding the Fourth Proportional to 18,756.64, 28,137.84 and 6,272.80

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Solution

The fourth proportional to 18,756.64, 28,137.84 and 6,272.80 is: 9,410.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.64 : 28,137.84 = 6,272.80 : x
  2. Step 2: Convert to fraction form
    18,756.64/28,137.84 = 6,272.80/x
  3. Step 3: Cross multiply
    18,756.64x = 28,137.84 × 6,272.80
  4. Step 4: Simplify right side
    18,756.64x = 176,503,042.75
  5. Step 5: Solve for x
    x = 176,503,042.75/18,756.64
  6. Step 6: Final answer
    x = 9,410.16

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.