Home / 20,889.24-31,326.56-8,406.03

Finding the Fourth Proportional to 20,889.24, 31,326.56 and 8,406.03

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Solution

The fourth proportional to 20,889.24, 31,326.56 and 8,406.03 is: 12,606.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.24 : 31,326.56 = 8,406.03 : x
  2. Step 2: Convert to fraction form
    20,889.24/31,326.56 = 8,406.03/x
  3. Step 3: Cross multiply
    20,889.24x = 31,326.56 × 8,406.03
  4. Step 4: Simplify right side
    20,889.24x = 263,332,003.16
  5. Step 5: Solve for x
    x = 263,332,003.16/20,889.24
  6. Step 6: Final answer
    x = 12,606.11

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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.