Home / 20,645.11-28,481.11-12,256.75

Finding the Fourth Proportional to 20,645.11, 28,481.11 and 12,256.75

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Solution

The fourth proportional to 20,645.11, 28,481.11 and 12,256.75 is: 16,908.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.11 : 28,481.11 = 12,256.75 : x
  2. Step 2: Convert to fraction form
    20,645.11/28,481.11 = 12,256.75/x
  3. Step 3: Cross multiply
    20,645.11x = 28,481.11 × 12,256.75
  4. Step 4: Simplify right side
    20,645.11x = 349,085,844.99
  5. Step 5: Solve for x
    x = 349,085,844.99/20,645.11
  6. Step 6: Final answer
    x = 16,908.89

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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.