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Finding the Fourth Proportional to 9,065.20, 13,600.20 and 3,221.20

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Solution

The fourth proportional to 9,065.20, 13,600.20 and 3,221.20 is: 4,832.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,065.20 : 13,600.20 = 3,221.20 : x
  2. Step 2: Convert to fraction form
    9,065.20/13,600.20 = 3,221.20/x
  3. Step 3: Cross multiply
    9,065.20x = 13,600.20 × 3,221.20
  4. Step 4: Simplify right side
    9,065.20x = 43,808,964.24
  5. Step 5: Solve for x
    x = 43,808,964.24/9,065.20
  6. Step 6: Final answer
    x = 4,832.65

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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.