Home / 12,490.86-18,739.30-4,170.94

Finding the Fourth Proportional to 12,490.86, 18,739.30 and 4,170.94

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Solution

The fourth proportional to 12,490.86, 18,739.30 and 4,170.94 is: 6,257.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.86 : 18,739.30 = 4,170.94 : x
  2. Step 2: Convert to fraction form
    12,490.86/18,739.30 = 4,170.94/x
  3. Step 3: Cross multiply
    12,490.86x = 18,739.30 × 4,170.94
  4. Step 4: Simplify right side
    12,490.86x = 78,160,551.90
  5. Step 5: Solve for x
    x = 78,160,551.90/12,490.86
  6. Step 6: Final answer
    x = 6,257.42

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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.