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Finding the Fourth Proportional to 18,484.80, 27,721.72 and 5,337.28

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Solution

The fourth proportional to 18,484.80, 27,721.72 and 5,337.28 is: 8,004.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,484.80 : 27,721.72 = 5,337.28 : x
  2. Step 2: Convert to fraction form
    18,484.80/27,721.72 = 5,337.28/x
  3. Step 3: Cross multiply
    18,484.80x = 27,721.72 × 5,337.28
  4. Step 4: Simplify right side
    18,484.80x = 147,958,581.72
  5. Step 5: Solve for x
    x = 147,958,581.72/18,484.80
  6. Step 6: Final answer
    x = 8,004.34

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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.