Home / 21,270.29-31,907.61-8,133.71

Finding the Fourth Proportional to 21,270.29, 31,907.61 and 8,133.71

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Solution

The fourth proportional to 21,270.29, 31,907.61 and 8,133.71 is: 12,201.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.29 : 31,907.61 = 8,133.71 : x
  2. Step 2: Convert to fraction form
    21,270.29/31,907.61 = 8,133.71/x
  3. Step 3: Cross multiply
    21,270.29x = 31,907.61 × 8,133.71
  4. Step 4: Simplify right side
    21,270.29x = 259,527,087.00
  5. Step 5: Solve for x
    x = 259,527,087.00/21,270.29
  6. Step 6: Final answer
    x = 12,201.39

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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.