Home / 3,917.90-5,406.58-2,149.45

Finding the Fourth Proportional to 3,917.90, 5,406.58 and 2,149.45

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Solution

The fourth proportional to 3,917.90, 5,406.58 and 2,149.45 is: 2,966.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.90 : 5,406.58 = 2,149.45 : x
  2. Step 2: Convert to fraction form
    3,917.90/5,406.58 = 2,149.45/x
  3. Step 3: Cross multiply
    3,917.90x = 5,406.58 × 2,149.45
  4. Step 4: Simplify right side
    3,917.90x = 11,621,173.38
  5. Step 5: Solve for x
    x = 11,621,173.38/3,917.90
  6. Step 6: Final answer
    x = 2,966.17

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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.