Home / 5,169.11-7,133.51-2,811.40

Finding the Fourth Proportional to 5,169.11, 7,133.51 and 2,811.40

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Solution

The fourth proportional to 5,169.11, 7,133.51 and 2,811.40 is: 3,879.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,169.11 : 7,133.51 = 2,811.40 : x
  2. Step 2: Convert to fraction form
    5,169.11/7,133.51 = 2,811.40/x
  3. Step 3: Cross multiply
    5,169.11x = 7,133.51 × 2,811.40
  4. Step 4: Simplify right side
    5,169.11x = 20,055,139.21
  5. Step 5: Solve for x
    x = 20,055,139.21/5,169.11
  6. Step 6: Final answer
    x = 3,879.81

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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.