Home / 2,813.20-4,216.38-1,991.71

Finding the Fourth Proportional to 2,813.20, 4,216.38 and 1,991.71

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Solution

The fourth proportional to 2,813.20, 4,216.38 and 1,991.71 is: 2,985.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.20 : 4,216.38 = 1,991.71 : x
  2. Step 2: Convert to fraction form
    2,813.20/4,216.38 = 1,991.71/x
  3. Step 3: Cross multiply
    2,813.20x = 4,216.38 × 1,991.71
  4. Step 4: Simplify right side
    2,813.20x = 8,397,806.21
  5. Step 5: Solve for x
    x = 8,397,806.21/2,813.20
  6. Step 6: Final answer
    x = 2,985.14

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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.