Home / 12,489.08-18,731.90-4,168.90

Finding the Fourth Proportional to 12,489.08, 18,731.90 and 4,168.90

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Solution

The fourth proportional to 12,489.08, 18,731.90 and 4,168.90 is: 6,252.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.08 : 18,731.90 = 4,168.90 : x
  2. Step 2: Convert to fraction form
    12,489.08/18,731.90 = 4,168.90/x
  3. Step 3: Cross multiply
    12,489.08x = 18,731.90 × 4,168.90
  4. Step 4: Simplify right side
    12,489.08x = 78,091,451.75
  5. Step 5: Solve for x
    x = 78,091,451.75/12,489.08
  6. Step 6: Final answer
    x = 6,252.78

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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.