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Finding the Fourth Proportional to 43,311.19, 64,992.70 and 18,687.19

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Solution

The fourth proportional to 43,311.19, 64,992.70 and 18,687.19 is: 28,041.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,311.19 : 64,992.70 = 18,687.19 : x
  2. Step 2: Convert to fraction form
    43,311.19/64,992.70 = 18,687.19/x
  3. Step 3: Cross multiply
    43,311.19x = 64,992.70 × 18,687.19
  4. Step 4: Simplify right side
    43,311.19x = 1,214,530,933.51
  5. Step 5: Solve for x
    x = 1,214,530,933.51/43,311.19
  6. Step 6: Final answer
    x = 28,041.97

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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.