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Finding the Fourth Proportional to 3,859.61, 5,326.17 and 2,181.01

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Solution

The fourth proportional to 3,859.61, 5,326.17 and 2,181.01 is: 3,009.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.61 : 5,326.17 = 2,181.01 : x
  2. Step 2: Convert to fraction form
    3,859.61/5,326.17 = 2,181.01/x
  3. Step 3: Cross multiply
    3,859.61x = 5,326.17 × 2,181.01
  4. Step 4: Simplify right side
    3,859.61x = 11,616,430.03
  5. Step 5: Solve for x
    x = 11,616,430.03/3,859.61
  6. Step 6: Final answer
    x = 3,009.74

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.