Home / 39,978.51-55,403.70-39,414.75

Finding the Fourth Proportional to 39,978.51, 55,403.70 and 39,414.75

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Solution

The fourth proportional to 39,978.51, 55,403.70 and 39,414.75 is: 54,622.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,978.51 : 55,403.70 = 39,414.75 : x
  2. Step 2: Convert to fraction form
    39,978.51/55,403.70 = 39,414.75/x
  3. Step 3: Cross multiply
    39,978.51x = 55,403.70 × 39,414.75
  4. Step 4: Simplify right side
    39,978.51x = 2,183,722,984.58
  5. Step 5: Solve for x
    x = 2,183,722,984.58/39,978.51
  6. Step 6: Final answer
    x = 54,622.42

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.