Home / 12,620.72-18,929.56-3,387.44

Finding the Fourth Proportional to 12,620.72, 18,929.56 and 3,387.44

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Solution

The fourth proportional to 12,620.72, 18,929.56 and 3,387.44 is: 5,080.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.72 : 18,929.56 = 3,387.44 : x
  2. Step 2: Convert to fraction form
    12,620.72/18,929.56 = 3,387.44/x
  3. Step 3: Cross multiply
    12,620.72x = 18,929.56 × 3,387.44
  4. Step 4: Simplify right side
    12,620.72x = 64,122,748.73
  5. Step 5: Solve for x
    x = 64,122,748.73/12,620.72
  6. Step 6: Final answer
    x = 5,080.75

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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.