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Finding the Fourth Proportional to 35,687.26, 53,530.90 and 12,311.90

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Solution

The fourth proportional to 35,687.26, 53,530.90 and 12,311.90 is: 18,467.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,687.26 : 53,530.90 = 12,311.90 : x
  2. Step 2: Convert to fraction form
    35,687.26/53,530.90 = 12,311.90/x
  3. Step 3: Cross multiply
    35,687.26x = 53,530.90 × 12,311.90
  4. Step 4: Simplify right side
    35,687.26x = 659,067,087.71
  5. Step 5: Solve for x
    x = 659,067,087.71/35,687.26
  6. Step 6: Final answer
    x = 18,467.85

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.