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Finding the Fourth Proportional to 7,274.83, 10,917.03 and 3,990.25

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Solution

The fourth proportional to 7,274.83, 10,917.03 and 3,990.25 is: 5,988.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,274.83 : 10,917.03 = 3,990.25 : x
  2. Step 2: Convert to fraction form
    7,274.83/10,917.03 = 3,990.25/x
  3. Step 3: Cross multiply
    7,274.83x = 10,917.03 × 3,990.25
  4. Step 4: Simplify right side
    7,274.83x = 43,561,678.96
  5. Step 5: Solve for x
    x = 43,561,678.96/7,274.83
  6. Step 6: Final answer
    x = 5,988.00

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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.