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Finding the Fourth Proportional to 12,651.22, 18,978.87 and 4,754.35

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Solution

The fourth proportional to 12,651.22, 18,978.87 and 4,754.35 is: 7,132.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.22 : 18,978.87 = 4,754.35 : x
  2. Step 2: Convert to fraction form
    12,651.22/18,978.87 = 4,754.35/x
  3. Step 3: Cross multiply
    12,651.22x = 18,978.87 × 4,754.35
  4. Step 4: Simplify right side
    12,651.22x = 90,232,190.58
  5. Step 5: Solve for x
    x = 90,232,190.58/12,651.22
  6. Step 6: Final answer
    x = 7,132.29

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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.