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Finding the Fourth Proportional to 6,622.66, 9,139.26 and 3,638.62

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Solution

The fourth proportional to 6,622.66, 9,139.26 and 3,638.62 is: 5,021.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,622.66 : 9,139.26 = 3,638.62 : x
  2. Step 2: Convert to fraction form
    6,622.66/9,139.26 = 3,638.62/x
  3. Step 3: Cross multiply
    6,622.66x = 9,139.26 × 3,638.62
  4. Step 4: Simplify right side
    6,622.66x = 33,254,294.22
  5. Step 5: Solve for x
    x = 33,254,294.22/6,622.66
  6. Step 6: Final answer
    x = 5,021.29

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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.