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Finding the Fourth Proportional to 6,978.89, 9,633.40 and 4,621.79

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Solution

The fourth proportional to 6,978.89, 9,633.40 and 4,621.79 is: 6,379.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,978.89 : 9,633.40 = 4,621.79 : x
  2. Step 2: Convert to fraction form
    6,978.89/9,633.40 = 4,621.79/x
  3. Step 3: Cross multiply
    6,978.89x = 9,633.40 × 4,621.79
  4. Step 4: Simplify right side
    6,978.89x = 44,523,551.79
  5. Step 5: Solve for x
    x = 44,523,551.79/6,978.89
  6. Step 6: Final answer
    x = 6,379.75

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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.