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Finding the Fourth Proportional to 3,866.32, 5,335.48 and 2,187.68

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Solution

The fourth proportional to 3,866.32, 5,335.48 and 2,187.68 is: 3,018.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,866.32 : 5,335.48 = 2,187.68 : x
  2. Step 2: Convert to fraction form
    3,866.32/5,335.48 = 2,187.68/x
  3. Step 3: Cross multiply
    3,866.32x = 5,335.48 × 2,187.68
  4. Step 4: Simplify right side
    3,866.32x = 11,672,322.89
  5. Step 5: Solve for x
    x = 11,672,322.89/3,866.32
  6. Step 6: Final answer
    x = 3,018.97

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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.