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Finding the Fourth Proportional to 3,865.71, 5,334.71 and 2,187.18

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Solution

The fourth proportional to 3,865.71, 5,334.71 and 2,187.18 is: 3,018.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.71 : 5,334.71 = 2,187.18 : x
  2. Step 2: Convert to fraction form
    3,865.71/5,334.71 = 2,187.18/x
  3. Step 3: Cross multiply
    3,865.71x = 5,334.71 × 2,187.18
  4. Step 4: Simplify right side
    3,865.71x = 11,667,960.08
  5. Step 5: Solve for x
    x = 11,667,960.08/3,865.71
  6. Step 6: Final answer
    x = 3,018.32

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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.