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Finding the Fourth Proportional to 15,321.92, 21,147.04 and 9,034.56

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Solution

The fourth proportional to 15,321.92, 21,147.04 and 9,034.56 is: 12,469.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.92 : 21,147.04 = 9,034.56 : x
  2. Step 2: Convert to fraction form
    15,321.92/21,147.04 = 9,034.56/x
  3. Step 3: Cross multiply
    15,321.92x = 21,147.04 × 9,034.56
  4. Step 4: Simplify right side
    15,321.92x = 191,054,201.70
  5. Step 5: Solve for x
    x = 191,054,201.70/15,321.92
  6. Step 6: Final answer
    x = 12,469.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.