Home / 42,879.35-64,284.68-20,378.73

Finding the Fourth Proportional to 42,879.35, 64,284.68 and 20,378.73

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Solution

The fourth proportional to 42,879.35, 64,284.68 and 20,378.73 is: 30,551.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,879.35 : 64,284.68 = 20,378.73 : x
  2. Step 2: Convert to fraction form
    42,879.35/64,284.68 = 20,378.73/x
  3. Step 3: Cross multiply
    42,879.35x = 64,284.68 × 20,378.73
  4. Step 4: Simplify right side
    42,879.35x = 1,310,040,428.87
  5. Step 5: Solve for x
    x = 1,310,040,428.87/42,879.35
  6. Step 6: Final answer
    x = 30,551.78

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1.5x scale

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.