Home / 12,691.20-19,034.70-4,257.60

Finding the Fourth Proportional to 12,691.20, 19,034.70 and 4,257.60

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Solution

The fourth proportional to 12,691.20, 19,034.70 and 4,257.60 is: 6,385.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.20 : 19,034.70 = 4,257.60 : x
  2. Step 2: Convert to fraction form
    12,691.20/19,034.70 = 4,257.60/x
  3. Step 3: Cross multiply
    12,691.20x = 19,034.70 × 4,257.60
  4. Step 4: Simplify right side
    12,691.20x = 81,042,138.72
  5. Step 5: Solve for x
    x = 81,042,138.72/12,691.20
  6. Step 6: Final answer
    x = 6,385.70

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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.