Home / 12,728.60-19,092.90-3,966.20

Finding the Fourth Proportional to 12,728.60, 19,092.90 and 3,966.20

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Solution

The fourth proportional to 12,728.60, 19,092.90 and 3,966.20 is: 5,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.60 : 19,092.90 = 3,966.20 : x
  2. Step 2: Convert to fraction form
    12,728.60/19,092.90 = 3,966.20/x
  3. Step 3: Cross multiply
    12,728.60x = 19,092.90 × 3,966.20
  4. Step 4: Simplify right side
    12,728.60x = 75,726,259.98
  5. Step 5: Solve for x
    x = 75,726,259.98/12,728.60
  6. Step 6: Final answer
    x = 5,949.30

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Similar ratio
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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.