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Finding the Fourth Proportional to 39,635, 54,696.54 and 21,730.04

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Solution

The fourth proportional to 39,635, 54,696.54 and 21,730.04 is: 29,987.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,635 : 54,696.54 = 21,730.04 : x
  2. Step 2: Convert to fraction form
    39,635/54,696.54 = 21,730.04/x
  3. Step 3: Cross multiply
    39,635x = 54,696.54 × 21,730.04
  4. Step 4: Simplify right side
    39,635x = 1,188,558,002.06
  5. Step 5: Solve for x
    x = 1,188,558,002.06/39,635
  6. Step 6: Final answer
    x = 29,987.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.