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Finding the Fourth Proportional to 5,678.78, 7,836.77 and 3,161.00

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Solution

The fourth proportional to 5,678.78, 7,836.77 and 3,161.00 is: 4,362.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.78 : 7,836.77 = 3,161.00 : x
  2. Step 2: Convert to fraction form
    5,678.78/7,836.77 = 3,161.00/x
  3. Step 3: Cross multiply
    5,678.78x = 7,836.77 × 3,161.00
  4. Step 4: Simplify right side
    5,678.78x = 24,772,033.76
  5. Step 5: Solve for x
    x = 24,772,033.76/5,678.78
  6. Step 6: Final answer
    x = 4,362.21

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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.