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Finding the Fourth Proportional to 6,489.69, 8,955.66 and 3,657.31

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Solution

The fourth proportional to 6,489.69, 8,955.66 and 3,657.31 is: 5,047.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.69 : 8,955.66 = 3,657.31 : x
  2. Step 2: Convert to fraction form
    6,489.69/8,955.66 = 3,657.31/x
  3. Step 3: Cross multiply
    6,489.69x = 8,955.66 × 3,657.31
  4. Step 4: Simplify right side
    6,489.69x = 32,753,624.87
  5. Step 5: Solve for x
    x = 32,753,624.87/6,489.69
  6. Step 6: Final answer
    x = 5,047.02

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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.