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Finding the Fourth Proportional to 6,489.20, 8,955.27 and 3,971.26

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Solution

The fourth proportional to 6,489.20, 8,955.27 and 3,971.26 is: 5,480.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.20 : 8,955.27 = 3,971.26 : x
  2. Step 2: Convert to fraction form
    6,489.20/8,955.27 = 3,971.26/x
  3. Step 3: Cross multiply
    6,489.20x = 8,955.27 × 3,971.26
  4. Step 4: Simplify right side
    6,489.20x = 35,563,640.91
  5. Step 5: Solve for x
    x = 35,563,640.91/6,489.20
  6. Step 6: Final answer
    x = 5,480.44

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1.5x scale

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.