Home / 3,918.13-5,406.98-2,149.74

Finding the Fourth Proportional to 3,918.13, 5,406.98 and 2,149.74

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Solution

The fourth proportional to 3,918.13, 5,406.98 and 2,149.74 is: 2,966.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.13 : 5,406.98 = 2,149.74 : x
  2. Step 2: Convert to fraction form
    3,918.13/5,406.98 = 2,149.74/x
  3. Step 3: Cross multiply
    3,918.13x = 5,406.98 × 2,149.74
  4. Step 4: Simplify right side
    3,918.13x = 11,623,578.22
  5. Step 5: Solve for x
    x = 11,623,578.22/3,918.13
  6. Step 6: Final answer
    x = 2,966.61

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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.