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Finding the Fourth Proportional to 39,079.44, 53,929.44 and 21,174.44

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Solution

The fourth proportional to 39,079.44, 53,929.44 and 21,174.44 is: 29,220.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,079.44 : 53,929.44 = 21,174.44 : x
  2. Step 2: Convert to fraction form
    39,079.44/53,929.44 = 21,174.44/x
  3. Step 3: Cross multiply
    39,079.44x = 53,929.44 × 21,174.44
  4. Step 4: Simplify right side
    39,079.44x = 1,141,925,421.87
  5. Step 5: Solve for x
    x = 1,141,925,421.87/39,079.44
  6. Step 6: Final answer
    x = 29,220.62

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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.