Home / 3,171.11-4,374.05-1,911.31

Finding the Fourth Proportional to 3,171.11, 4,374.05 and 1,911.31

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Solution

The fourth proportional to 3,171.11, 4,374.05 and 1,911.31 is: 2,636.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.11 : 4,374.05 = 1,911.31 : x
  2. Step 2: Convert to fraction form
    3,171.11/4,374.05 = 1,911.31/x
  3. Step 3: Cross multiply
    3,171.11x = 4,374.05 × 1,911.31
  4. Step 4: Simplify right side
    3,171.11x = 8,360,165.51
  5. Step 5: Solve for x
    x = 8,360,165.51/3,171.11
  6. Step 6: Final answer
    x = 2,636.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.