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Finding the Fourth Proportional to 12,679.14, 19,018.68 and 3,445.14

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Solution

The fourth proportional to 12,679.14, 19,018.68 and 3,445.14 is: 5,167.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.14 : 19,018.68 = 3,445.14 : x
  2. Step 2: Convert to fraction form
    12,679.14/19,018.68 = 3,445.14/x
  3. Step 3: Cross multiply
    12,679.14x = 19,018.68 × 3,445.14
  4. Step 4: Simplify right side
    12,679.14x = 65,522,015.22
  5. Step 5: Solve for x
    x = 65,522,015.22/12,679.14
  6. Step 6: Final answer
    x = 5,167.70

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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.