Home / 21,152.75-31,729.64-7,112.96

Finding the Fourth Proportional to 21,152.75, 31,729.64 and 7,112.96

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Solution

The fourth proportional to 21,152.75, 31,729.64 and 7,112.96 is: 10,669.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.75 : 31,729.64 = 7,112.96 : x
  2. Step 2: Convert to fraction form
    21,152.75/31,729.64 = 7,112.96/x
  3. Step 3: Cross multiply
    21,152.75x = 31,729.64 × 7,112.96
  4. Step 4: Simplify right side
    21,152.75x = 225,691,660.13
  5. Step 5: Solve for x
    x = 225,691,660.13/21,152.75
  6. Step 6: Final answer
    x = 10,669.61

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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.