Home / 3,975.20-5,962.80-2,520.80

Finding the Fourth Proportional to 3,975.20, 5,962.80 and 2,520.80

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Solution

The fourth proportional to 3,975.20, 5,962.80 and 2,520.80 is: 3,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.20 : 5,962.80 = 2,520.80 : x
  2. Step 2: Convert to fraction form
    3,975.20/5,962.80 = 2,520.80/x
  3. Step 3: Cross multiply
    3,975.20x = 5,962.80 × 2,520.80
  4. Step 4: Simplify right side
    3,975.20x = 15,031,026.24
  5. Step 5: Solve for x
    x = 15,031,026.24/3,975.20
  6. Step 6: Final answer
    x = 3,781.20

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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.