Home / 2,171.18-3,249.48-1,991.36

Finding the Fourth Proportional to 2,171.18, 3,249.48 and 1,991.36

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Solution

The fourth proportional to 2,171.18, 3,249.48 and 1,991.36 is: 2,980.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.18 : 3,249.48 = 1,991.36 : x
  2. Step 2: Convert to fraction form
    2,171.18/3,249.48 = 1,991.36/x
  3. Step 3: Cross multiply
    2,171.18x = 3,249.48 × 1,991.36
  4. Step 4: Simplify right side
    2,171.18x = 6,470,884.49
  5. Step 5: Solve for x
    x = 6,470,884.49/2,171.18
  6. Step 6: Final answer
    x = 2,980.35

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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.