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Finding the Fourth Proportional to 6,978.98, 9,630.64 and 3,835.28

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Solution

The fourth proportional to 6,978.98, 9,630.64 and 3,835.28 is: 5,292.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,978.98 : 9,630.64 = 3,835.28 : x
  2. Step 2: Convert to fraction form
    6,978.98/9,630.64 = 3,835.28/x
  3. Step 3: Cross multiply
    6,978.98x = 9,630.64 × 3,835.28
  4. Step 4: Simplify right side
    6,978.98x = 36,936,200.98
  5. Step 5: Solve for x
    x = 36,936,200.98/6,978.98
  6. Step 6: Final answer
    x = 5,292.49

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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.