Home / 13,984.20-20,969.10-5,214.60

Finding the Fourth Proportional to 13,984.20, 20,969.10 and 5,214.60

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Solution

The fourth proportional to 13,984.20, 20,969.10 and 5,214.60 is: 7,819.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,984.20 : 20,969.10 = 5,214.60 : x
  2. Step 2: Convert to fraction form
    13,984.20/20,969.10 = 5,214.60/x
  3. Step 3: Cross multiply
    13,984.20x = 20,969.10 × 5,214.60
  4. Step 4: Simplify right side
    13,984.20x = 109,345,468.86
  5. Step 5: Solve for x
    x = 109,345,468.86/13,984.20
  6. Step 6: Final answer
    x = 7,819.22

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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.