Home / 8,742.80-13,119-4,125.68

Finding the Fourth Proportional to 8,742.80, 13,119 and 4,125.68

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Solution

The fourth proportional to 8,742.80, 13,119 and 4,125.68 is: 6,190.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,742.80 : 13,119 = 4,125.68 : x
  2. Step 2: Convert to fraction form
    8,742.80/13,119 = 4,125.68/x
  3. Step 3: Cross multiply
    8,742.80x = 13,119 × 4,125.68
  4. Step 4: Simplify right side
    8,742.80x = 54,124,795.92
  5. Step 5: Solve for x
    x = 54,124,795.92/8,742.80
  6. Step 6: Final answer
    x = 6,190.79

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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.