Home / 39,636-54,697.92-21,731.04

Finding the Fourth Proportional to 39,636, 54,697.92 and 21,731.04

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Solution

The fourth proportional to 39,636, 54,697.92 and 21,731.04 is: 29,988.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,636 : 54,697.92 = 21,731.04 : x
  2. Step 2: Convert to fraction form
    39,636/54,697.92 = 21,731.04/x
  3. Step 3: Cross multiply
    39,636x = 54,697.92 × 21,731.04
  4. Step 4: Simplify right side
    39,636x = 1,188,642,687.44
  5. Step 5: Solve for x
    x = 1,188,642,687.44/39,636
  6. Step 6: Final answer
    x = 29,988.97

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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.