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Finding the Fourth Proportional to 15,183.92, 20,945.03 and 9,129.95

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Solution

The fourth proportional to 15,183.92, 20,945.03 and 9,129.95 is: 12,594.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,183.92 : 20,945.03 = 9,129.95 : x
  2. Step 2: Convert to fraction form
    15,183.92/20,945.03 = 9,129.95/x
  3. Step 3: Cross multiply
    15,183.92x = 20,945.03 × 9,129.95
  4. Step 4: Simplify right side
    15,183.92x = 191,227,076.65
  5. Step 5: Solve for x
    x = 191,227,076.65/15,183.92
  6. Step 6: Final answer
    x = 12,594.05

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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.