Home / 13,579.20-20,368.86-4,219.02

Finding the Fourth Proportional to 13,579.20, 20,368.86 and 4,219.02

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Solution

The fourth proportional to 13,579.20, 20,368.86 and 4,219.02 is: 6,328.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.20 : 20,368.86 = 4,219.02 : x
  2. Step 2: Convert to fraction form
    13,579.20/20,368.86 = 4,219.02/x
  3. Step 3: Cross multiply
    13,579.20x = 20,368.86 × 4,219.02
  4. Step 4: Simplify right side
    13,579.20x = 85,936,627.72
  5. Step 5: Solve for x
    x = 85,936,627.72/13,579.20
  6. Step 6: Final answer
    x = 6,328.55

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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.