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Finding the Fourth Proportional to 18,326.94, 27,490.41 and 5,178.21

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Solution

The fourth proportional to 18,326.94, 27,490.41 and 5,178.21 is: 7,767.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,326.94 : 27,490.41 = 5,178.21 : x
  2. Step 2: Convert to fraction form
    18,326.94/27,490.41 = 5,178.21/x
  3. Step 3: Cross multiply
    18,326.94x = 27,490.41 × 5,178.21
  4. Step 4: Simplify right side
    18,326.94x = 142,351,115.97
  5. Step 5: Solve for x
    x = 142,351,115.97/18,326.94
  6. Step 6: Final answer
    x = 7,767.32

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Similar ratio
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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.