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Finding the Fourth Proportional to 11,252.80, 16,879.20 and 5,015.80

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Solution

The fourth proportional to 11,252.80, 16,879.20 and 5,015.80 is: 7,523.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,252.80 : 16,879.20 = 5,015.80 : x
  2. Step 2: Convert to fraction form
    11,252.80/16,879.20 = 5,015.80/x
  3. Step 3: Cross multiply
    11,252.80x = 16,879.20 × 5,015.80
  4. Step 4: Simplify right side
    11,252.80x = 84,662,691.36
  5. Step 5: Solve for x
    x = 84,662,691.36/11,252.80
  6. Step 6: Final answer
    x = 7,523.70

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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.