Home / 3,918.69-5,407.90-2,150.36

Finding the Fourth Proportional to 3,918.69, 5,407.90 and 2,150.36

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Solution

The fourth proportional to 3,918.69, 5,407.90 and 2,150.36 is: 2,967.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.69 : 5,407.90 = 2,150.36 : x
  2. Step 2: Convert to fraction form
    3,918.69/5,407.90 = 2,150.36/x
  3. Step 3: Cross multiply
    3,918.69x = 5,407.90 × 2,150.36
  4. Step 4: Simplify right side
    3,918.69x = 11,628,919.71
  5. Step 5: Solve for x
    x = 11,628,919.71/3,918.69
  6. Step 6: Final answer
    x = 2,967.55

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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.