Home / 12,579.70-18,871.35-3,815.30

Finding the Fourth Proportional to 12,579.70, 18,871.35 and 3,815.30

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Solution

The fourth proportional to 12,579.70, 18,871.35 and 3,815.30 is: 5,723.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.70 : 18,871.35 = 3,815.30 : x
  2. Step 2: Convert to fraction form
    12,579.70/18,871.35 = 3,815.30/x
  3. Step 3: Cross multiply
    12,579.70x = 18,871.35 × 3,815.30
  4. Step 4: Simplify right side
    12,579.70x = 71,999,861.66
  5. Step 5: Solve for x
    x = 71,999,861.66/12,579.70
  6. Step 6: Final answer
    x = 5,723.50

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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.