Home / 20,421.97-28,182.33-11,469.25

Finding the Fourth Proportional to 20,421.97, 28,182.33 and 11,469.25

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Solution

The fourth proportional to 20,421.97, 28,182.33 and 11,469.25 is: 15,827.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.97 : 28,182.33 = 11,469.25 : x
  2. Step 2: Convert to fraction form
    20,421.97/28,182.33 = 11,469.25/x
  3. Step 3: Cross multiply
    20,421.97x = 28,182.33 × 11,469.25
  4. Step 4: Simplify right side
    20,421.97x = 323,230,065.05
  5. Step 5: Solve for x
    x = 323,230,065.05/20,421.97
  6. Step 6: Final answer
    x = 15,827.56

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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.