Home / 12,742.82-19,114.24-3,978.49

Finding the Fourth Proportional to 12,742.82, 19,114.24 and 3,978.49

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Solution

The fourth proportional to 12,742.82, 19,114.24 and 3,978.49 is: 5,967.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.82 : 19,114.24 = 3,978.49 : x
  2. Step 2: Convert to fraction form
    12,742.82/19,114.24 = 3,978.49/x
  3. Step 3: Cross multiply
    12,742.82x = 19,114.24 × 3,978.49
  4. Step 4: Simplify right side
    12,742.82x = 76,045,787.08
  5. Step 5: Solve for x
    x = 76,045,787.08/12,742.82
  6. Step 6: Final answer
    x = 5,967.73

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Double scale
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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.