Home / 13,578.20-20,367.36-4,218.02

Finding the Fourth Proportional to 13,578.20, 20,367.36 and 4,218.02

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Solution

The fourth proportional to 13,578.20, 20,367.36 and 4,218.02 is: 6,327.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.20 : 20,367.36 = 4,218.02 : x
  2. Step 2: Convert to fraction form
    13,578.20/20,367.36 = 4,218.02/x
  3. Step 3: Cross multiply
    13,578.20x = 20,367.36 × 4,218.02
  4. Step 4: Simplify right side
    13,578.20x = 85,909,829.99
  5. Step 5: Solve for x
    x = 85,909,829.99/13,578.20
  6. Step 6: Final answer
    x = 6,327.04

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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.