Home / 3,171.61-4,378.35-2,111.14

Finding the Fourth Proportional to 3,171.61, 4,378.35 and 2,111.14

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Solution

The fourth proportional to 3,171.61, 4,378.35 and 2,111.14 is: 2,914.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.61 : 4,378.35 = 2,111.14 : x
  2. Step 2: Convert to fraction form
    3,171.61/4,378.35 = 2,111.14/x
  3. Step 3: Cross multiply
    3,171.61x = 4,378.35 × 2,111.14
  4. Step 4: Simplify right side
    3,171.61x = 9,243,309.82
  5. Step 5: Solve for x
    x = 9,243,309.82/3,171.61
  6. Step 6: Final answer
    x = 2,914.39

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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.