Home / 12,579.40-18,857.10-4,679.80

Finding the Fourth Proportional to 12,579.40, 18,857.10 and 4,679.80

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Solution

The fourth proportional to 12,579.40, 18,857.10 and 4,679.80 is: 7,015.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.40 : 18,857.10 = 4,679.80 : x
  2. Step 2: Convert to fraction form
    12,579.40/18,857.10 = 4,679.80/x
  3. Step 3: Cross multiply
    12,579.40x = 18,857.10 × 4,679.80
  4. Step 4: Simplify right side
    12,579.40x = 88,247,456.58
  5. Step 5: Solve for x
    x = 88,247,456.58/12,579.40
  6. Step 6: Final answer
    x = 7,015.24

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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.