Home / 12,679.12-19,021.68-3,914.16

Finding the Fourth Proportional to 12,679.12, 19,021.68 and 3,914.16

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Solution

The fourth proportional to 12,679.12, 19,021.68 and 3,914.16 is: 5,872.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.12 : 19,021.68 = 3,914.16 : x
  2. Step 2: Convert to fraction form
    12,679.12/19,021.68 = 3,914.16/x
  3. Step 3: Cross multiply
    12,679.12x = 19,021.68 × 3,914.16
  4. Step 4: Simplify right side
    12,679.12x = 74,453,898.99
  5. Step 5: Solve for x
    x = 74,453,898.99/12,679.12
  6. Step 6: Final answer
    x = 5,872.17

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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.