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Finding the Fourth Proportional to 6,640.44, 9,167.49 and 3,988.50

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Solution

The fourth proportional to 6,640.44, 9,167.49 and 3,988.50 is: 5,506.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.44 : 9,167.49 = 3,988.50 : x
  2. Step 2: Convert to fraction form
    6,640.44/9,167.49 = 3,988.50/x
  3. Step 3: Cross multiply
    6,640.44x = 9,167.49 × 3,988.50
  4. Step 4: Simplify right side
    6,640.44x = 36,564,533.87
  5. Step 5: Solve for x
    x = 36,564,533.87/6,640.44
  6. Step 6: Final answer
    x = 5,506.34

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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.