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Finding the Fourth Proportional to 7,818.13, 11,731.04 and 3,658.42

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Solution

The fourth proportional to 7,818.13, 11,731.04 and 3,658.42 is: 5,489.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,818.13 : 11,731.04 = 3,658.42 : x
  2. Step 2: Convert to fraction form
    7,818.13/11,731.04 = 3,658.42/x
  3. Step 3: Cross multiply
    7,818.13x = 11,731.04 × 3,658.42
  4. Step 4: Simplify right side
    7,818.13x = 42,917,071.36
  5. Step 5: Solve for x
    x = 42,917,071.36/7,818.13
  6. Step 6: Final answer
    x = 5,489.43

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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.