Home / 21,163.55-31,765.84-11,309.76

Finding the Fourth Proportional to 21,163.55, 31,765.84 and 11,309.76

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Solution

The fourth proportional to 21,163.55, 31,765.84 and 11,309.76 is: 16,975.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.55 : 31,765.84 = 11,309.76 : x
  2. Step 2: Convert to fraction form
    21,163.55/31,765.84 = 11,309.76/x
  3. Step 3: Cross multiply
    21,163.55x = 31,765.84 × 11,309.76
  4. Step 4: Simplify right side
    21,163.55x = 359,263,998.32
  5. Step 5: Solve for x
    x = 359,263,998.32/21,163.55
  6. Step 6: Final answer
    x = 16,975.61

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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.