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Finding the Fourth Proportional to 6,660.81, 9,985.71 and 3,372.21

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Solution

The fourth proportional to 6,660.81, 9,985.71 and 3,372.21 is: 5,055.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,660.81 : 9,985.71 = 3,372.21 : x
  2. Step 2: Convert to fraction form
    6,660.81/9,985.71 = 3,372.21/x
  3. Step 3: Cross multiply
    6,660.81x = 9,985.71 × 3,372.21
  4. Step 4: Simplify right side
    6,660.81x = 33,673,911.12
  5. Step 5: Solve for x
    x = 33,673,911.12/6,660.81
  6. Step 6: Final answer
    x = 5,055.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.