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Finding the Fourth Proportional to 3,866.84, 5,336.48 and 2,187.61

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Solution

The fourth proportional to 3,866.84, 5,336.48 and 2,187.61 is: 3,019.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,866.84 : 5,336.48 = 2,187.61 : x
  2. Step 2: Convert to fraction form
    3,866.84/5,336.48 = 2,187.61/x
  3. Step 3: Cross multiply
    3,866.84x = 5,336.48 × 2,187.61
  4. Step 4: Simplify right side
    3,866.84x = 11,674,129.14
  5. Step 5: Solve for x
    x = 11,674,129.14/3,866.84
  6. Step 6: Final answer
    x = 3,019.04

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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.