Home / 3,865.78-5,334.81-2,187.20

Finding the Fourth Proportional to 3,865.78, 5,334.81 and 2,187.20

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Solution

The fourth proportional to 3,865.78, 5,334.81 and 2,187.20 is: 3,018.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.78 : 5,334.81 = 2,187.20 : x
  2. Step 2: Convert to fraction form
    3,865.78/5,334.81 = 2,187.20/x
  3. Step 3: Cross multiply
    3,865.78x = 5,334.81 × 2,187.20
  4. Step 4: Simplify right side
    3,865.78x = 11,668,296.43
  5. Step 5: Solve for x
    x = 11,668,296.43/3,865.78
  6. Step 6: Final answer
    x = 3,018.36

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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.