Home / 4,989.36-7,479.60-2,520.72

Finding the Fourth Proportional to 4,989.36, 7,479.60 and 2,520.72

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Solution

The fourth proportional to 4,989.36, 7,479.60 and 2,520.72 is: 3,778.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.36 : 7,479.60 = 2,520.72 : x
  2. Step 2: Convert to fraction form
    4,989.36/7,479.60 = 2,520.72/x
  3. Step 3: Cross multiply
    4,989.36x = 7,479.60 × 2,520.72
  4. Step 4: Simplify right side
    4,989.36x = 18,853,977.31
  5. Step 5: Solve for x
    x = 18,853,977.31/4,989.36
  6. Step 6: Final answer
    x = 3,778.84

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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.