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Finding the Fourth Proportional to 35,811.20, 53,716.80 and 11,187.20

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Solution

The fourth proportional to 35,811.20, 53,716.80 and 11,187.20 is: 16,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,811.20 : 53,716.80 = 11,187.20 : x
  2. Step 2: Convert to fraction form
    35,811.20/53,716.80 = 11,187.20/x
  3. Step 3: Cross multiply
    35,811.20x = 53,716.80 × 11,187.20
  4. Step 4: Simplify right side
    35,811.20x = 600,940,584.96
  5. Step 5: Solve for x
    x = 600,940,584.96/35,811.20
  6. Step 6: Final answer
    x = 16,780.80

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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.