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Finding the Fourth Proportional to 3,865.94, 5,334.97 and 2,187.17

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Solution

The fourth proportional to 3,865.94, 5,334.97 and 2,187.17 is: 3,018.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.94 : 5,334.97 = 2,187.17 : x
  2. Step 2: Convert to fraction form
    3,865.94/5,334.97 = 2,187.17/x
  3. Step 3: Cross multiply
    3,865.94x = 5,334.97 × 2,187.17
  4. Step 4: Simplify right side
    3,865.94x = 11,668,475.40
  5. Step 5: Solve for x
    x = 11,668,475.40/3,865.94
  6. Step 6: Final answer
    x = 3,018.28

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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.