Home / 2,117.12-3,175.68-1,996.80

Finding the Fourth Proportional to 2,117.12, 3,175.68 and 1,996.80

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Solution

The fourth proportional to 2,117.12, 3,175.68 and 1,996.80 is: 2,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.12 : 3,175.68 = 1,996.80 : x
  2. Step 2: Convert to fraction form
    2,117.12/3,175.68 = 1,996.80/x
  3. Step 3: Cross multiply
    2,117.12x = 3,175.68 × 1,996.80
  4. Step 4: Simplify right side
    2,117.12x = 6,341,197.82
  5. Step 5: Solve for x
    x = 6,341,197.82/2,117.12
  6. Step 6: Final answer
    x = 2,995.20

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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.