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Finding the Fourth Proportional to 6,620, 9,139.89 and 4,104.79

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Solution

The fourth proportional to 6,620, 9,139.89 and 4,104.79 is: 5,667.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620 : 9,139.89 = 4,104.79 : x
  2. Step 2: Convert to fraction form
    6,620/9,139.89 = 4,104.79/x
  3. Step 3: Cross multiply
    6,620x = 9,139.89 × 4,104.79
  4. Step 4: Simplify right side
    6,620x = 37,517,329.07
  5. Step 5: Solve for x
    x = 37,517,329.07/6,620
  6. Step 6: Final answer
    x = 5,667.27

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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.