Home / 5,078.84-7,615.18-3,321.72

Finding the Fourth Proportional to 5,078.84, 7,615.18 and 3,321.72

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Solution

The fourth proportional to 5,078.84, 7,615.18 and 3,321.72 is: 4,980.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.84 : 7,615.18 = 3,321.72 : x
  2. Step 2: Convert to fraction form
    5,078.84/7,615.18 = 3,321.72/x
  3. Step 3: Cross multiply
    5,078.84x = 7,615.18 × 3,321.72
  4. Step 4: Simplify right side
    5,078.84x = 25,295,487.41
  5. Step 5: Solve for x
    x = 25,295,487.41/5,078.84
  6. Step 6: Final answer
    x = 4,980.56

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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.