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Finding the Fourth Proportional to 18,138.99, 27,213.06 and 8,783.49

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Solution

The fourth proportional to 18,138.99, 27,213.06 and 8,783.49 is: 13,177.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.99 : 27,213.06 = 8,783.49 : x
  2. Step 2: Convert to fraction form
    18,138.99/27,213.06 = 8,783.49/x
  3. Step 3: Cross multiply
    18,138.99x = 27,213.06 × 8,783.49
  4. Step 4: Simplify right side
    18,138.99x = 239,025,640.38
  5. Step 5: Solve for x
    x = 239,025,640.38/18,138.99
  6. Step 6: Final answer
    x = 13,177.45

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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.