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Finding the Fourth Proportional to 5,517.89, 7,615.89 and 3,629.64

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Solution

The fourth proportional to 5,517.89, 7,615.89 and 3,629.64 is: 5,009.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,517.89 : 7,615.89 = 3,629.64 : x
  2. Step 2: Convert to fraction form
    5,517.89/7,615.89 = 3,629.64/x
  3. Step 3: Cross multiply
    5,517.89x = 7,615.89 × 3,629.64
  4. Step 4: Simplify right side
    5,517.89x = 27,642,967.54
  5. Step 5: Solve for x
    x = 27,642,967.54/5,517.89
  6. Step 6: Final answer
    x = 5,009.70

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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.