Home / 39,778.66-54,895.89-21,874.42

Finding the Fourth Proportional to 39,778.66, 54,895.89 and 21,874.42

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Solution

The fourth proportional to 39,778.66, 54,895.89 and 21,874.42 is: 30,187.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,778.66 : 54,895.89 = 21,874.42 : x
  2. Step 2: Convert to fraction form
    39,778.66/54,895.89 = 21,874.42/x
  3. Step 3: Cross multiply
    39,778.66x = 54,895.89 × 21,874.42
  4. Step 4: Simplify right side
    39,778.66x = 1,200,815,754.13
  5. Step 5: Solve for x
    x = 1,200,815,754.13/39,778.66
  6. Step 6: Final answer
    x = 30,187.44

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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.