Home / 12,579.78-18,862.38-5,175.87

Finding the Fourth Proportional to 12,579.78, 18,862.38 and 5,175.87

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Solution

The fourth proportional to 12,579.78, 18,862.38 and 5,175.87 is: 7,760.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.78 : 18,862.38 = 5,175.87 : x
  2. Step 2: Convert to fraction form
    12,579.78/18,862.38 = 5,175.87/x
  3. Step 3: Cross multiply
    12,579.78x = 18,862.38 × 5,175.87
  4. Step 4: Simplify right side
    12,579.78x = 97,629,260.99
  5. Step 5: Solve for x
    x = 97,629,260.99/12,579.78
  6. Step 6: Final answer
    x = 7,760.81

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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.