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Finding the Fourth Proportional to 7,109.20, 10,663 and 2,179

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Solution

The fourth proportional to 7,109.20, 10,663 and 2,179 is: 3,268.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,109.20 : 10,663 = 2,179 : x
  2. Step 2: Convert to fraction form
    7,109.20/10,663 = 2,179/x
  3. Step 3: Cross multiply
    7,109.20x = 10,663 × 2,179
  4. Step 4: Simplify right side
    7,109.20x = 23,234,677
  5. Step 5: Solve for x
    x = 23,234,677/7,109.20
  6. Step 6: Final answer
    x = 3,268.25

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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.