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Finding the Fourth Proportional to 13,191.20, 19,794.09 and 7,351.10

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Solution

The fourth proportional to 13,191.20, 19,794.09 and 7,351.10 is: 11,030.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.20 : 19,794.09 = 7,351.10 : x
  2. Step 2: Convert to fraction form
    13,191.20/19,794.09 = 7,351.10/x
  3. Step 3: Cross multiply
    13,191.20x = 19,794.09 × 7,351.10
  4. Step 4: Simplify right side
    13,191.20x = 145,508,236.03
  5. Step 5: Solve for x
    x = 145,508,236.03/13,191.20
  6. Step 6: Final answer
    x = 11,030.71

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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.