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Finding the Fourth Proportional to 7,274.98, 10,917.25 and 3,990.38

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Solution

The fourth proportional to 7,274.98, 10,917.25 and 3,990.38 is: 5,988.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,274.98 : 10,917.25 = 3,990.38 : x
  2. Step 2: Convert to fraction form
    7,274.98/10,917.25 = 3,990.38/x
  3. Step 3: Cross multiply
    7,274.98x = 10,917.25 × 3,990.38
  4. Step 4: Simplify right side
    7,274.98x = 43,563,921.47
  5. Step 5: Solve for x
    x = 43,563,921.47/7,274.98
  6. Step 6: Final answer
    x = 5,988.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.