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Finding the Fourth Proportional to 12,490.85, 18,745.52 and 5,917.05

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Solution

The fourth proportional to 12,490.85, 18,745.52 and 5,917.05 is: 8,879.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.85 : 18,745.52 = 5,917.05 : x
  2. Step 2: Convert to fraction form
    12,490.85/18,745.52 = 5,917.05/x
  3. Step 3: Cross multiply
    12,490.85x = 18,745.52 × 5,917.05
  4. Step 4: Simplify right side
    12,490.85x = 110,918,149.53
  5. Step 5: Solve for x
    x = 110,918,149.53/12,490.85
  6. Step 6: Final answer
    x = 8,879.96

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1.5x scale

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.