Home / 12,579.82-18,868.64-4,259.66

Finding the Fourth Proportional to 12,579.82, 18,868.64 and 4,259.66

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Solution

The fourth proportional to 12,579.82, 18,868.64 and 4,259.66 is: 6,389.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.82 : 18,868.64 = 4,259.66 : x
  2. Step 2: Convert to fraction form
    12,579.82/18,868.64 = 4,259.66/x
  3. Step 3: Cross multiply
    12,579.82x = 18,868.64 × 4,259.66
  4. Step 4: Simplify right side
    12,579.82x = 80,373,991.06
  5. Step 5: Solve for x
    x = 80,373,991.06/12,579.82
  6. Step 6: Final answer
    x = 6,389.12

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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.