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Finding the Fourth Proportional to 11,036.80, 16,550.80 and 3,639.20

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Solution

The fourth proportional to 11,036.80, 16,550.80 and 3,639.20 is: 5,457.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,036.80 : 16,550.80 = 3,639.20 : x
  2. Step 2: Convert to fraction form
    11,036.80/16,550.80 = 3,639.20/x
  3. Step 3: Cross multiply
    11,036.80x = 16,550.80 × 3,639.20
  4. Step 4: Simplify right side
    11,036.80x = 60,231,671.36
  5. Step 5: Solve for x
    x = 60,231,671.36/11,036.80
  6. Step 6: Final answer
    x = 5,457.35

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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.