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Finding the Fourth Proportional to 13,189.20, 19,762.20 and 11,245.20

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Solution

The fourth proportional to 13,189.20, 19,762.20 and 11,245.20 is: 16,849.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.20 : 19,762.20 = 11,245.20 : x
  2. Step 2: Convert to fraction form
    13,189.20/19,762.20 = 11,245.20/x
  3. Step 3: Cross multiply
    13,189.20x = 19,762.20 × 11,245.20
  4. Step 4: Simplify right side
    13,189.20x = 222,229,891.44
  5. Step 5: Solve for x
    x = 222,229,891.44/13,189.20
  6. Step 6: Final answer
    x = 16,849.38

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1.5x scale

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.