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Finding the Fourth Proportional to 20,757.36, 28,676.36 and 13,604.25

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Solution

The fourth proportional to 20,757.36, 28,676.36 and 13,604.25 is: 18,794.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.36 : 28,676.36 = 13,604.25 : x
  2. Step 2: Convert to fraction form
    20,757.36/28,676.36 = 13,604.25/x
  3. Step 3: Cross multiply
    20,757.36x = 28,676.36 × 13,604.25
  4. Step 4: Simplify right side
    20,757.36x = 390,120,512.08
  5. Step 5: Solve for x
    x = 390,120,512.08/20,757.36
  6. Step 6: Final answer
    x = 18,794.32

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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.