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Finding the Fourth Proportional to 18,484.70, 27,731.10 and 7,388.60

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Solution

The fourth proportional to 18,484.70, 27,731.10 and 7,388.60 is: 11,084.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,484.70 : 27,731.10 = 7,388.60 : x
  2. Step 2: Convert to fraction form
    18,484.70/27,731.10 = 7,388.60/x
  3. Step 3: Cross multiply
    18,484.70x = 27,731.10 × 7,388.60
  4. Step 4: Simplify right side
    18,484.70x = 204,894,005.46
  5. Step 5: Solve for x
    x = 204,894,005.46/18,484.70
  6. Step 6: Final answer
    x = 11,084.52

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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.