Home / 20,391.33-28,155.97-13,224.66

Finding the Fourth Proportional to 20,391.33, 28,155.97 and 13,224.66

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Solution

The fourth proportional to 20,391.33, 28,155.97 and 13,224.66 is: 18,260.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.33 : 28,155.97 = 13,224.66 : x
  2. Step 2: Convert to fraction form
    20,391.33/28,155.97 = 13,224.66/x
  3. Step 3: Cross multiply
    20,391.33x = 28,155.97 × 13,224.66
  4. Step 4: Simplify right side
    20,391.33x = 372,353,130.22
  5. Step 5: Solve for x
    x = 372,353,130.22/20,391.33
  6. Step 6: Final answer
    x = 18,260.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.