Home / 2,911.36-3,998.12-2,491.72

Finding the Fourth Proportional to 2,911.36, 3,998.12 and 2,491.72

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Solution

The fourth proportional to 2,911.36, 3,998.12 and 2,491.72 is: 3,421.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.36 : 3,998.12 = 2,491.72 : x
  2. Step 2: Convert to fraction form
    2,911.36/3,998.12 = 2,491.72/x
  3. Step 3: Cross multiply
    2,911.36x = 3,998.12 × 2,491.72
  4. Step 4: Simplify right side
    2,911.36x = 9,962,195.57
  5. Step 5: Solve for x
    x = 9,962,195.57/2,911.36
  6. Step 6: Final answer
    x = 3,421.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.