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Finding the Fourth Proportional to 7,179.88, 9,909.12 and 4,036

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Solution

The fourth proportional to 7,179.88, 9,909.12 and 4,036 is: 5,570.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,179.88 : 9,909.12 = 4,036 : x
  2. Step 2: Convert to fraction form
    7,179.88/9,909.12 = 4,036/x
  3. Step 3: Cross multiply
    7,179.88x = 9,909.12 × 4,036
  4. Step 4: Simplify right side
    7,179.88x = 39,993,208.32
  5. Step 5: Solve for x
    x = 39,993,208.32/7,179.88
  6. Step 6: Final answer
    x = 5,570.18

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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.