Home / 20,842.45-31,278.26-9,163.87

Finding the Fourth Proportional to 20,842.45, 31,278.26 and 9,163.87

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Solution

The fourth proportional to 20,842.45, 31,278.26 and 9,163.87 is: 13,752.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.45 : 31,278.26 = 9,163.87 : x
  2. Step 2: Convert to fraction form
    20,842.45/31,278.26 = 9,163.87/x
  3. Step 3: Cross multiply
    20,842.45x = 31,278.26 × 9,163.87
  4. Step 4: Simplify right side
    20,842.45x = 286,629,908.47
  5. Step 5: Solve for x
    x = 286,629,908.47/20,842.45
  6. Step 6: Final answer
    x = 13,752.22

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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.