Home / 38,775.86-58,163.82-12,480.60

Finding the Fourth Proportional to 38,775.86, 58,163.82 and 12,480.60

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Solution

The fourth proportional to 38,775.86, 58,163.82 and 12,480.60 is: 18,720.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,775.86 : 58,163.82 = 12,480.60 : x
  2. Step 2: Convert to fraction form
    38,775.86/58,163.82 = 12,480.60/x
  3. Step 3: Cross multiply
    38,775.86x = 58,163.82 × 12,480.60
  4. Step 4: Simplify right side
    38,775.86x = 725,919,371.89
  5. Step 5: Solve for x
    x = 725,919,371.89/38,775.86
  6. Step 6: Final answer
    x = 18,720.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.