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Finding the Fourth Proportional to 9,138.66, 13,708.02 and 2,213.16

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Solution

The fourth proportional to 9,138.66, 13,708.02 and 2,213.16 is: 3,319.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.66 : 13,708.02 = 2,213.16 : x
  2. Step 2: Convert to fraction form
    9,138.66/13,708.02 = 2,213.16/x
  3. Step 3: Cross multiply
    9,138.66x = 13,708.02 × 2,213.16
  4. Step 4: Simplify right side
    9,138.66x = 30,338,041.54
  5. Step 5: Solve for x
    x = 30,338,041.54/9,138.66
  6. Step 6: Final answer
    x = 3,319.75

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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.