Home / 20,780.28-28,676.03-11,348.64

Finding the Fourth Proportional to 20,780.28, 28,676.03 and 11,348.64

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Solution

The fourth proportional to 20,780.28, 28,676.03 and 11,348.64 is: 15,660.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.28 : 28,676.03 = 11,348.64 : x
  2. Step 2: Convert to fraction form
    20,780.28/28,676.03 = 11,348.64/x
  3. Step 3: Cross multiply
    20,780.28x = 28,676.03 × 11,348.64
  4. Step 4: Simplify right side
    20,780.28x = 325,433,884.36
  5. Step 5: Solve for x
    x = 325,433,884.36/20,780.28
  6. Step 6: Final answer
    x = 15,660.71

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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.