Home / 21,978,779.12-30,332,530.92-12,192,378.56

Finding the Fourth Proportional to 21,978,779.12, 30,332,530.92 and 12,192,378.56

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Solution

The fourth proportional to 21,978,779.12, 30,332,530.92 and 12,192,378.56 is: 16,826,489.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,978,779.12 : 30,332,530.92 = 12,192,378.56 : x
  2. Step 2: Convert to fraction form
    21,978,779.12/30,332,530.92 = 12,192,378.56/x
  3. Step 3: Cross multiply
    21,978,779.12x = 30,332,530.92 × 12,192,378.56
  4. Step 4: Simplify right side
    21,978,779.12x = 369,825,699,659,545.12
  5. Step 5: Solve for x
    x = 369,825,699,659,545.12/21,978,779.12
  6. Step 6: Final answer
    x = 16,826,489.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.