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Finding the Fourth Proportional to 18,331.12, 27,496.56 and 4,480

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Solution

The fourth proportional to 18,331.12, 27,496.56 and 4,480 is: 6,719.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,331.12 : 27,496.56 = 4,480 : x
  2. Step 2: Convert to fraction form
    18,331.12/27,496.56 = 4,480/x
  3. Step 3: Cross multiply
    18,331.12x = 27,496.56 × 4,480
  4. Step 4: Simplify right side
    18,331.12x = 123,184,588.80
  5. Step 5: Solve for x
    x = 123,184,588.80/18,331.12
  6. Step 6: Final answer
    x = 6,719.97

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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.