Home / 5,406.29-8,108.71-2,121.69

Finding the Fourth Proportional to 5,406.29, 8,108.71 and 2,121.69

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Solution

The fourth proportional to 5,406.29, 8,108.71 and 2,121.69 is: 3,182.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,406.29 : 8,108.71 = 2,121.69 : x
  2. Step 2: Convert to fraction form
    5,406.29/8,108.71 = 2,121.69/x
  3. Step 3: Cross multiply
    5,406.29x = 8,108.71 × 2,121.69
  4. Step 4: Simplify right side
    5,406.29x = 17,204,194.02
  5. Step 5: Solve for x
    x = 17,204,194.02/5,406.29
  6. Step 6: Final answer
    x = 3,182.25

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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.