Home / 21,163.68-31,760.10-9,489.96

Finding the Fourth Proportional to 21,163.68, 31,760.10 and 9,489.96

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Solution

The fourth proportional to 21,163.68, 31,760.10 and 9,489.96 is: 14,241.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.68 : 31,760.10 = 9,489.96 : x
  2. Step 2: Convert to fraction form
    21,163.68/31,760.10 = 9,489.96/x
  3. Step 3: Cross multiply
    21,163.68x = 31,760.10 × 9,489.96
  4. Step 4: Simplify right side
    21,163.68x = 301,402,078.60
  5. Step 5: Solve for x
    x = 301,402,078.60/21,163.68
  6. Step 6: Final answer
    x = 14,241.48

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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.