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Finding the Fourth Proportional to 18,614.72, 27,922.02 and 7,521.28

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Solution

The fourth proportional to 18,614.72, 27,922.02 and 7,521.28 is: 11,281.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,614.72 : 27,922.02 = 7,521.28 : x
  2. Step 2: Convert to fraction form
    18,614.72/27,922.02 = 7,521.28/x
  3. Step 3: Cross multiply
    18,614.72x = 27,922.02 × 7,521.28
  4. Step 4: Simplify right side
    18,614.72x = 210,009,190.98
  5. Step 5: Solve for x
    x = 210,009,190.98/18,614.72
  6. Step 6: Final answer
    x = 11,281.89

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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.