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Finding the Fourth Proportional to 5,717.09, 7,890.81 and 3,724.09

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Solution

The fourth proportional to 5,717.09, 7,890.81 and 3,724.09 is: 5,140.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,717.09 : 7,890.81 = 3,724.09 : x
  2. Step 2: Convert to fraction form
    5,717.09/7,890.81 = 3,724.09/x
  3. Step 3: Cross multiply
    5,717.09x = 7,890.81 × 3,724.09
  4. Step 4: Simplify right side
    5,717.09x = 29,386,086.61
  5. Step 5: Solve for x
    x = 29,386,086.61/5,717.09
  6. Step 6: Final answer
    x = 5,140.04

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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.