Home / 20,972.09-31,469.07-8,501.33

Finding the Fourth Proportional to 20,972.09, 31,469.07 and 8,501.33

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Solution

The fourth proportional to 20,972.09, 31,469.07 and 8,501.33 is: 12,756.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.09 : 31,469.07 = 8,501.33 : x
  2. Step 2: Convert to fraction form
    20,972.09/31,469.07 = 8,501.33/x
  3. Step 3: Cross multiply
    20,972.09x = 31,469.07 × 8,501.33
  4. Step 4: Simplify right side
    20,972.09x = 267,528,791.52
  5. Step 5: Solve for x
    x = 267,528,791.52/20,972.09
  6. Step 6: Final answer
    x = 12,756.42

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1.5x scale

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.