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Finding the Fourth Proportional to 6,639.54, 9,162.64 and 3,655.68

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Solution

The fourth proportional to 6,639.54, 9,162.64 and 3,655.68 is: 5,044.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.54 : 9,162.64 = 3,655.68 : x
  2. Step 2: Convert to fraction form
    6,639.54/9,162.64 = 3,655.68/x
  3. Step 3: Cross multiply
    6,639.54x = 9,162.64 × 3,655.68
  4. Step 4: Simplify right side
    6,639.54x = 33,495,679.80
  5. Step 5: Solve for x
    x = 33,495,679.80/6,639.54
  6. Step 6: Final answer
    x = 5,044.88

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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.