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Finding the Fourth Proportional to 18,632.61, 27,948.88 and 4,781.61

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Solution

The fourth proportional to 18,632.61, 27,948.88 and 4,781.61 is: 7,172.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,632.61 : 27,948.88 = 4,781.61 : x
  2. Step 2: Convert to fraction form
    18,632.61/27,948.88 = 4,781.61/x
  3. Step 3: Cross multiply
    18,632.61x = 27,948.88 × 4,781.61
  4. Step 4: Simplify right side
    18,632.61x = 133,640,644.10
  5. Step 5: Solve for x
    x = 133,640,644.10/18,632.61
  6. Step 6: Final answer
    x = 7,172.41

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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.