Home / 13,579.42-20,372.30-4,218.96

Finding the Fourth Proportional to 13,579.42, 20,372.30 and 4,218.96

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Solution

The fourth proportional to 13,579.42, 20,372.30 and 4,218.96 is: 6,329.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.42 : 20,372.30 = 4,218.96 : x
  2. Step 2: Convert to fraction form
    13,579.42/20,372.30 = 4,218.96/x
  3. Step 3: Cross multiply
    13,579.42x = 20,372.30 × 4,218.96
  4. Step 4: Simplify right side
    13,579.42x = 85,949,918.81
  5. Step 5: Solve for x
    x = 85,949,918.81/13,579.42
  6. Step 6: Final answer
    x = 6,329.42

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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.