Home / 18,719.40-28,078.83-5,571.84

Finding the Fourth Proportional to 18,719.40, 28,078.83 and 5,571.84

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Solution

The fourth proportional to 18,719.40, 28,078.83 and 5,571.84 is: 8,357.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.40 : 28,078.83 = 5,571.84 : x
  2. Step 2: Convert to fraction form
    18,719.40/28,078.83 = 5,571.84/x
  3. Step 3: Cross multiply
    18,719.40x = 28,078.83 × 5,571.84
  4. Step 4: Simplify right side
    18,719.40x = 156,450,748.15
  5. Step 5: Solve for x
    x = 156,450,748.15/18,719.40
  6. Step 6: Final answer
    x = 8,357.68

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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.