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Finding the Fourth Proportional to 18,477.40, 27,708 and 5,329.48

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Solution

The fourth proportional to 18,477.40, 27,708 and 5,329.48 is: 7,991.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,477.40 : 27,708 = 5,329.48 : x
  2. Step 2: Convert to fraction form
    18,477.40/27,708 = 5,329.48/x
  3. Step 3: Cross multiply
    18,477.40x = 27,708 × 5,329.48
  4. Step 4: Simplify right side
    18,477.40x = 147,669,231.84
  5. Step 5: Solve for x
    x = 147,669,231.84/18,477.40
  6. Step 6: Final answer
    x = 7,991.88

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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.