Home / 57,839.76-86,736.96-20,391.84

Finding the Fourth Proportional to 57,839.76, 86,736.96 and 20,391.84

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Solution

The fourth proportional to 57,839.76, 86,736.96 and 20,391.84 is: 30,579.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,839.76 : 86,736.96 = 20,391.84 : x
  2. Step 2: Convert to fraction form
    57,839.76/86,736.96 = 20,391.84/x
  3. Step 3: Cross multiply
    57,839.76x = 86,736.96 × 20,391.84
  4. Step 4: Simplify right side
    57,839.76x = 1,768,726,210.41
  5. Step 5: Solve for x
    x = 1,768,726,210.41/57,839.76
  6. Step 6: Final answer
    x = 30,579.76

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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.