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Finding the Fourth Proportional to 8,676.12, 13,021.20 and 4,930.20

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Solution

The fourth proportional to 8,676.12, 13,021.20 and 4,930.20 is: 7,399.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,676.12 : 13,021.20 = 4,930.20 : x
  2. Step 2: Convert to fraction form
    8,676.12/13,021.20 = 4,930.20/x
  3. Step 3: Cross multiply
    8,676.12x = 13,021.20 × 4,930.20
  4. Step 4: Simplify right side
    8,676.12x = 64,197,120.24
  5. Step 5: Solve for x
    x = 64,197,120.24/8,676.12
  6. Step 6: Final answer
    x = 7,399.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.